PRP Therapy March 1, 2026 27 min read

The Complete Guide to Platelet-Rich Plasma (PRP) Therapy

How PRP therapy works, what to expect, who it's for, and what separates precision PRP from generic PRP — explained by Dr. Danny Clark, ND.

Dr. Danny Clark, ND

Director of Orthobiologics, Protea Performance Center

If you’re reading this, chances are you’ve been dealing with joint pain, a nagging tendon injury, or maybe arthritis that’s been slowing you down for months — or years. You’ve probably tried physical therapy, maybe had a steroid injection or two, and you’re wondering what else is out there. Maybe someone mentioned PRP, and you started Googling.

Here’s what I want you to know right up front: PRP therapy isn’t a miracle cure. I’m not going to sit here and promise you that one injection will fix everything. But what I can tell you is that platelet-rich plasma represents one of the most exciting developments in musculoskeletal medicine — because instead of masking your pain, it’s designed to support your body’s own ability to heal damaged tissue.

And the science behind it? It’s really cool. Let me walk you through everything.

What Is Platelet-Rich Plasma (PRP)?

Let’s start simple. PRP is a concentration of your own platelets, drawn from your own blood and processed right here in the clinic.

Most people think of platelets as the cells that help your blood clot when you get a cut. That’s true — but that’s only part of what they do. Platelets are actually packed with growth factors and signaling proteins. Think of them as little warning signals that scream out, “Hey, this area needs help healing.” When you cut your finger, platelets rush to the site, release those growth factors, and kick off the entire repair process — new blood vessels form, new tissue gets built, inflammation gets managed.

What PRP does is take that natural process and amplify it. We draw a small amount of your blood, concentrate those platelets to several times their normal levels, and then inject that concentrated preparation precisely into the area of damage. The goal is to stimulate a healing response in tissue that’s been struggling to heal on its own.

The concept is straightforward: give your body more of what it already uses to repair itself, and deliver it exactly where it’s needed.

Deeper Dive: The Growth Factors Inside Your Platelets

When platelets are activated, they undergo a process called degranulation — releasing the contents of their alpha-granules into the surrounding tissue. These granules contain a sophisticated mix of bioactive molecules, each with a specific role in tissue repair:

PDGF (Platelet-Derived Growth Factor): Drives cell proliferation and recruits fibroblasts — the cells that build new connective tissue

TGF-β (Transforming Growth Factor-Beta): Modulates inflammation and promotes cell differentiation

VEGF (Vascular Endothelial Growth Factor): Stimulates new blood vessel formation (angiogenesis), improving nutrient delivery to healing tissue

IGF-1 (Insulin-Like Growth Factor-1): Promotes cell growth and inhibits cell death

FGF (Fibroblast Growth Factor): Supports tissue repair and wound healing

EGF (Epidermal Growth Factor): Stimulates cell growth and differentiation

HGF (Hepatocyte Growth Factor): Promotes tissue regeneration and has anti-inflammatory properties

These growth factors don’t work in isolation — they operate as a coordinated signaling network, each amplifying and modulating the others’ effects [3].

How Does PRP Therapy Work? The Science Behind Healing

So what actually happens after PRP is injected into damaged tissue? The healing process unfolds in three distinct phases, and it’s really important to understand this because it explains why PRP results take time — and why that timeline is actually a good sign.

Phase 1: Inflammation (Hours to Days)

This might sound counterintuitive, but the first thing PRP does is create a controlled inflammatory response. I tell my patients: this is actually what we want. Inflammation is your body’s first responder — it’s the demolition crew showing up to a construction site. The activated platelets release signaling molecules that recruit immune cells to the area, particularly macrophages. These macrophages clean up damaged tissue and set the stage for rebuilding.

This is why you may feel some soreness or swelling in the first few days after a PRP injection. That’s the healing response kicking in.

Phase 2: Proliferation (Days to Weeks)

This is where the rebuilding happens. Growth factors from the platelets signal your body’s stem cells and fibroblasts to start producing new tissue — new collagen, new cartilage matrix components, new blood vessels to bring nutrients to the area. Think of it as the framing and drywall going up on a construction project.

Phase 3: Remodeling (Weeks to Months)

The new tissue matures and organizes. Collagen fibers cross-link and strengthen. The tissue gradually takes on the functional properties it needs. This is the finishing work — the paint, the fixtures, the final inspection.

This three-phase process is why I tell patients that PRP is not a quick fix. You’re not covering up a symptom — you’re stimulating actual tissue repair. And tissue repair takes time.

Deeper Dive: Macrophage Polarization and Immune Modulation

One of the more fascinating aspects of PRP’s mechanism involves macrophage polarization. Macrophages exist on a spectrum between two phenotypes: M1 (pro-inflammatory, “cleanup crew”) and M2 (anti-inflammatory, “rebuilding crew”). PRP-derived IL-4 promotes the differentiation of monocytes toward the regenerative M2 phenotype while suppressing the inflammatory M1 phenotype through inhibition of interferon-gamma (IFN-γ) signaling [3].

This shift from M1 to M2 dominance is critical — it represents the transition from tissue breakdown to tissue rebuilding. PRP essentially helps your immune system shift gears at the right time, moving from demolition to construction in a coordinated manner.

Additionally, platelets secrete serotonin (5-HT) during degranulation, which promotes vasoconstriction initially and then stimulates angiogenesis — the formation of new blood vessels that deliver oxygen and nutrients to healing tissue [3].

Why PRP Quality Matters — Not All PRP Is the Same

This is something that not a lot of practices talk about, and it’s really important.

Here’s an analogy I use with my patients: would you take half of a Tylenol or half an antibiotic dose and expect to get the same results? Of course not. The dose matters. And the same thing applies when it comes to your PRP.

The problem is that PRP preparation varies enormously from clinic to clinic. Some practices use a single-spin centrifugation protocol that barely concentrates platelets above baseline levels. Others use systems that produce highly concentrated preparations with specific platelet counts. The difference in what actually gets injected into your tissue can be dramatic — and it directly affects outcomes.

Platelet Concentration: The Numbers Matter

Recent research has clarified something that clinicians have suspected for years: there’s a threshold below which PRP simply doesn’t work as well. A comprehensive analysis of dosing data found that studies reporting no benefit from PRP commonly used fewer than 3 billion platelets per injection, while effective studies exceeded 3-5 billion platelets. The highest-performing protocols delivered cumulative doses of 10-12 billion platelets across a treatment course [11, 29, 45].

This is why we use a hematology analyzer in-clinic to measure the absolute platelet count in every PRP preparation. I don’t want to guess what I’m injecting — I want to know. If the concentration isn’t where it needs to be, we can adjust the preparation in real time. This is quantified biology, not a generic blood draw and re-injection.

Double-Spin vs. Single-Spin Centrifugation

The gold standard for PRP preparation is a double-spin centrifugation method [1, 4]. The first spin separates your red blood cells from the plasma containing platelets. The second spin concentrates those platelets into a pellet at the bottom of the tube, which is then resuspended in a small volume of plasma to create the final PRP product.

Single-spin protocols are faster but typically produce lower platelet concentrations — sometimes only 1.5 to 2 times baseline levels. Double-spin protocols can achieve 4 to 8 times baseline concentration [1, 36]. The difference matters.

Leukocyte-Rich vs. Leukocyte-Poor PRP

Another variable that affects outcomes is white blood cell content. Leukocyte-rich PRP (LR-PRP) contains higher concentrations of white blood cells, while leukocyte-poor PRP (LP-PRP) minimizes them.

The clinical distinction is significant: a meta-analysis by Kim and colleagues found that LP-PRP resulted in 64% lower odds of pain reactions and 56% lower odds of swelling compared to LR-PRP, while maintaining equivalent therapeutic efficacy for joint injections [41]. For intra-articular applications — injecting into a joint — LP-PRP appears to be the better choice. For certain tendon applications, LR-PRP’s more robust inflammatory response may actually be beneficial.

This is why a one-size-fits-all approach to PRP doesn’t make sense. The formulation should be tailored to the condition being addressed.

Deeper Dive: The Standardization Problem

One of the most significant challenges in PRP research is the profound heterogeneity in preparation protocols across studies. Centrifugation speeds in published research range from 1,050 RPM to 3,300 RPM, with durations from a single 7-minute spin to triple centrifugation requiring 35 cumulative minutes [14]. Commercial PRP kits exhibit substantial discrepancies in separation principles, resulting in wildly inconsistent platelet concentrations and leukocyte contamination in final products [22].

This standardization crisis is a major reason why some meta-analyses report modest benefits while others show robust superiority — the studies are literally comparing different products that all get called “PRP.” When you control for preparation quality and platelet dose, the evidence becomes much more consistent [5, 45].

What Conditions Can PRP Help With?

PRP has been studied extensively across a range of musculoskeletal conditions. The evidence varies by condition — some areas have strong, consistent data, while others are still emerging. Here’s what the current research tells us.

Knee Osteoarthritis

This is the most comprehensively studied application of PRP, and the evidence is compelling — particularly for mild to moderate disease.

A 2025 meta-analysis examining 28 randomized controlled trials with 3,246 patients found that PRP produced comparable pain relief to hyaluronic acid but superior functional improvement, especially when combined with HA. Critically, early intervention in patients with mild to moderate arthritis (Kellgren-Lawrence grade I-II) was associated with significantly better outcomes than late-stage disease [5].

Another major analysis of 11 randomized trials with 1,616 patients showed significant pain improvement at both 3 months and 6 months post-injection compared to placebo [44]. When platelet concentration exceeded 1 million per microliter, PRP achieved clinically meaningful improvement at all time points through 12 months [45].

The takeaway: PRP may be most effective for knee osteoarthritis when applied earlier in the disease process, with adequate platelet concentration, and ideally combined with physical therapy to provide both the cellular healing from the injection and the mechanical signaling from rehabilitation. Both come together and build on each other to help give that tissue the best possible chance at healing.

Tendinopathies

Lateral epicondylitis (tennis elbow): Long-term studies consistently show PRP outperforms corticosteroid injections beyond 6 months, with more sustained improvements in pain relief and functional recovery [6].

Patellar tendinopathy (jumper’s knee): A systematic review of 70 studies with 2,350 patients found that multiple PRP injections serve as an effective non-surgical treatment for chronic patellar tendinopathy, with mid-term efficacy surpassing shockwave therapy. MRI confirmed enhanced tendon structural integrity [6].

Achilles tendinopathy: Results here are more mixed. Some well-designed studies have shown no superiority over placebo when combined with eccentric exercise therapy [6]. This is an area where patient selection and preparation quality likely play significant roles in outcomes.

Chronic tendinopathy (general): A 2024 meta-analysis specifically examining PRP as a second-line treatment — meaning patients who had already failed first-line conservative care — found clinically meaningful pain reduction after 12 months. This is particularly relevant because surgery is generally not offered to these patients, making PRP a valuable option in a population with limited alternatives [9].

Rotator Cuff and Shoulder Conditions

A 2025 meta-analysis of 13 randomized controlled trials with 880 patients found that PRP augmentation enhanced early functional recovery and pain control after rotator cuff repair, with significantly higher UCLA scores and Constant shoulder scores compared to conventional repair alone [7]. Benefits were most pronounced in medium and large tears treated with leukocyte-poor PRP [7].

For rotator cuff tendinopathy specifically, corticosteroids provide faster short-term relief (under 3 months), while PRP may be favored for mid- to long-term outcomes at 6-12 months [20].

Hip Osteoarthritis

While less extensively studied than knee OA, emerging evidence is encouraging. A meta-analysis found no significant difference in pain scores between PRP and steroid injections, but patients who received PRP had significantly better functional outcome scores two years after injection [8]. PRP’s utility for longer-term functional improvement appears to be the key advantage.

Plantar Fasciitis

A meta-analysis of 21 randomized controlled trials with 1,356 patients found PRP significantly more effective in reducing pain compared to corticosteroid injections, extracorporeal shock wave therapy, and placebo, with superior improvements in functional scores [37].

Muscle Injuries

A 2026 meta-analysis of acute hamstring injuries found that PRP reduced return-to-play time by an average of 8.6 days compared to control (21.4 versus 30.0 days), though the authors noted high variability between studies. Benefits were most pronounced when injections were image-guided [18].

Spine Conditions

Emerging evidence supports intradiscal PRP injection for chronic lumbar disc disease. A study examining percutaneous endoscopic lumbar discectomy with PRP injection found lower pain scores, better functional outcomes, and reduced recurrence rates compared to discectomy alone [35]. This area is still developing, but the early data is promising.

What to Expect During a PRP Procedure

Understanding exactly what happens during a PRP procedure helps patients feel more comfortable and know what to expect. Here’s a step-by-step walkthrough.

Before the Procedure

We typically recommend avoiding anti-inflammatory medications (NSAIDs like ibuprofen or naproxen) for at least 5-7 days before your PRP injection. These medications can interfere with platelet function and the inflammatory response that PRP relies on to work. Acetaminophen (Tylenol) is generally fine for pain management during this period.

Stay well-hydrated before your appointment — it makes the blood draw easier and can improve platelet yield.

Step 1: Blood Draw

We draw approximately 30 milliliters of blood from a vein in your arm — similar to a standard lab blood draw. The blood is collected into tubes containing an anticoagulant (acid citrate dextrose solution) to prevent clotting during processing [1, 4].

Step 2: Centrifugation and Processing

Your blood goes immediately into our centrifuge. Using a double-spin protocol, we separate your red blood cells from the plasma and platelets, then concentrate the platelets into a small volume of plasma. This process takes approximately 15-20 minutes.

Once processing is complete, we run the sample through our hematology analyzer to verify the platelet count. I want to know exactly what we’re working with — not guess. If the concentration needs adjustment, we can address that before the injection.

Step 3: Preparation and Sterile Field

The injection site is cleaned and prepped with a full sterile field. This is something that not a lot of practices do for PRP injections, but it’s standard protocol in our clinic. Infection risk with PRP is already very low because we’re using your own blood, but maintaining strict sterile technique throughout the entire process — from blood draw to processing to injection — minimizes any risk to negligible levels [15].

Step 4: Ultrasound-Guided Injection

This is a really important step, and I’ll explain why in detail in the next section. Using real-time ultrasound imaging, I visualize the target tissue — whether that’s a joint space, a tendon, a ligament, or a nerve — and guide the needle precisely to the area of damage. You can see the ultrasound screen during the procedure, and I walk you through what we’re looking at.

The injection itself takes just a few minutes. Depending on the condition, we may inject into multiple structures — because pain is rarely caused by just one thing.

Step 5: Post-Procedure

After the injection, you’ll rest briefly in the clinic. Most patients can drive themselves home. You may experience some soreness and swelling at the injection site for 2-5 days — this is the inflammatory phase of healing and is actually a sign that the PRP is working.

We typically recommend:

Days 1-3: Rest, ice as needed for comfort, acetaminophen for pain (no NSAIDs)
Days 3-7: Light activity, gentle range of motion
Week 2+: Gradual return to activity, begin physical therapy if prescribed
Avoid: High-impact activity and NSAIDs for at least 2 weeks

Why Ultrasound Guidance Makes a Difference

Let me give you an analogy. Imagine you went to a restaurant, ordered your food, paid for your food, and then the waiter said, “Let’s flip a coin to see if you actually get your food.” You’d walk out of that restaurant, right? But that’s essentially what happens with a blind injection — an injection performed without image guidance.

Studies consistently show that blind injections — where the physician uses anatomical landmarks alone to guide needle placement — miss the intended target 30-40% of the time, depending on the joint [4]. That means you’re paying for a treatment, going through the procedure, and there’s a significant chance the biologic material isn’t even reaching the damaged tissue.

Ultrasound-guided injections solve this problem entirely. I can see the needle in real time, watch it enter the target tissue, and confirm that the PRP is being delivered exactly where it needs to go. There’s no guessing. Every injection in our clinic is performed under ultrasound guidance — it’s not optional, it’s standard.

Beyond accuracy, ultrasound also serves as a diagnostic tool during the procedure. I can visualize the condition of the tissue — see areas of damage, inflammation, or degeneration — and adjust the treatment plan in real time. Sometimes I identify additional structures that need to be addressed that weren’t apparent on earlier imaging.

This is why precision matters. You’re investing in a treatment that relies on getting the right concentration of platelets to the right tissue. Image guidance ensures that investment isn’t wasted.

PRP Results: Timeline and What to Expect

One of the most common questions I get is: “How quickly will I feel better?” And I always want to set realistic expectations, because PRP works differently than treatments most patients are used to.

The Timeline

Weeks 1-2: You may actually feel slightly worse before you feel better. The initial inflammatory response — that demolition phase — can cause temporary soreness and swelling. This is normal and expected.

Weeks 2-6: Gradual improvement begins as the proliferative phase kicks in. New tissue is being built. Most patients start noticing reduced pain and improved function during this window.

Months 2-6: This is where most patients experience peak improvement. The remodeling phase is underway, and the new tissue is maturing and strengthening.

Months 6-12+: Benefits can continue to accrue as tissue remodeling completes. A 2025 meta-analysis demonstrated significant pain improvement at both 3 and 6 months post-injection, with high-platelet formulations maintaining benefits through 12 months [44, 45].

How Long Do Results Last?

This varies significantly based on the condition, its severity, and individual factors. For knee osteoarthritis, many patients experience meaningful relief for 6-12 months or longer after a treatment course. Some patients with mild to moderate arthritis report sustained improvement beyond 12 months [5].

For tendinopathies, the structural improvements in tendon integrity appear to be more durable, as PRP is stimulating actual tissue repair rather than providing temporary symptomatic relief.

Re-Injection Protocol

I don’t sell injection packages. I don’t know how many injections it’s going to take to get you better, and I don’t think it’s fair to charge for something I can’t predict. So we take it one injection, one procedure at a time.

Typically, we evaluate your response at about 3 months post-injection. If you’ve had significant improvement, we may not need to do anything further. If there’s been partial improvement, an additional injection may help build on that progress. Research suggests that cumulative platelet doses of 10-12 billion across multiple injections appear optimal, with three injections achieving a therapeutic plateau in most cases [11].

Factors That Affect Outcomes

Not everyone responds to PRP the same way. Research has identified several factors that influence outcomes:

Disease severity: Mild to moderate conditions respond better than severe, advanced disease [5]
Age: Younger patients generally respond better, though meaningful improvement occurs across age groups
Platelet count and concentration: Higher-quality PRP preparations with verified platelet counts produce more consistent results [11, 45]
Injection accuracy: Ultrasound-guided injections ensure the biologic reaches the target tissue [4]
Physical therapy compliance: Combining PRP with structured rehabilitation amplifies results — you’re getting the cellular healing from the injections and the mechanical signaling from physical therapy
BMI: Higher body mass index may reduce response rates, likely due to increased systemic inflammation

PRP vs. Cortisone Injections: Why We Prefer Regenerative Approaches

This comparison comes up in nearly every new patient conversation, and it’s an important one.

Cortisone (corticosteroid) injections are the most commonly prescribed injection for joint pain and tendinopathy. They work by suppressing inflammation — and they’re effective at it. Most patients feel significant relief within days. The problem? That relief is temporary, and there’s a cost.

Here’s how I explain it to my patients: if your house is on fire, a cortisone injection is like unplugging the smoke alarm because it’s annoying. The alarm stops — you feel better — but the fire is still burning. Eventually, the smoke gets so bad you can’t ignore it anymore.

PRP takes a different approach. Instead of suppressing the inflammatory signal, we’re designed to address the source of that signal — the damaged tissue itself. The goal is to put the fire out.

The Evidence

Research consistently shows that cortisone injections provide superior short-term relief (under 3 months), while PRP demonstrates better outcomes at 6-12 months [6, 20]. For lateral epicondylitis, patellar tendinopathy, and plantar fasciitis, PRP outperforms corticosteroids at every time point beyond 6 months [6, 37].

The Risk of Repeated Steroids

There’s another consideration that doesn’t get discussed enough: repeated cortisone injections carry risk. Evidence suggests that repeated steroid injections may accelerate cartilage breakdown in osteoarthritic joints, potentially worsening the underlying condition over time [16]. They can also weaken tendon tissue, increasing the risk of tendon rupture with repeated use.

This doesn’t mean cortisone is never appropriate — there are situations where short-term inflammation control is necessary and valuable. But as a long-term strategy for managing a degenerative condition, suppressing symptoms without supporting tissue repair has significant limitations.

How Much Does PRP Cost?

I believe in transparency about pricing, so let’s talk about this directly.

PRP therapy is currently an out-of-pocket treatment for the vast majority of patients in the United States. Typical costs range from $500 to $2,000 per injection depending on geographic location, the specific clinic, and the preparation protocol used [16, 19].

Why the Price Range Is So Wide

The cost variation reflects real differences in what you’re getting. Clinics using basic single-spin protocols with minimal quality control will generally charge less. Clinics using double-spin centrifugation, hematology analyzer verification, ultrasound-guided injection, and full sterile protocols have higher costs because the procedure itself is more involved — and, based on the research, more likely to produce meaningful results.

In our practice, we use a two-fee structure: one fee for the biologic processing (the blood draw, centrifugation, platelet count verification) and a per-injection fee for each structure treated. I don’t want my patients paying one global price regardless of how complex their case is — it doesn’t feel fair to me and fair to the patient.

Why Insurance Doesn’t Cover PRP

The fundamental barrier is classification. Most commercial insurance plans, Medicare, and Medicaid classify PRP as “investigational” [16]. This reflects a persistent lag between clinical innovation and insurance policy — insurers require large-scale, long-term data before approving coverage, and PRP lacks a dedicated CPT code that payors routinely reimburse.

The research supporting PRP is substantial and growing, but insurance policies typically lag clinical evidence by 5-10 years [16]. Until these policies are updated, PRP remains out-of-pocket.

Using HSA/FSA Funds

Many patients can use Health Savings Account (HSA) or Flexible Spending Account (FSA) funds for PRP treatments, even when insurance doesn’t cover the procedure directly [16]. This can provide meaningful tax advantages. Check with your plan administrator for eligibility.

The Value Comparison

When evaluating cost, it helps to think beyond the single-treatment price:

Cortisone injections may be covered by insurance, but provide only temporary relief and may need to be repeated every 3-6 months — indefinitely. Over several years, the cumulative cost, office visit copays, and potential cartilage damage add up.
Surgery (knee replacement, rotator cuff repair) can cost $30,000-$60,000+ even with insurance coverage, requires general anesthesia, involves weeks to months of recovery, and carries inherent operative risks.
PRP at $500-$2,000 per injection, with most patients needing 1-3 injections, may reduce pain, support function, and potentially delay or prevent surgery — with minimal downtime and an excellent safety profile.

For many patients, this represents a compelling value proposition.

Side Effects and Safety

One of PRP’s greatest strengths is its safety profile. Because PRP is autologous — meaning it comes from your own body — the risk of allergic reaction, immune rejection, or disease transmission is essentially zero.

Common Side Effects

Injection site soreness: The most common experience. Mild to moderate discomfort lasting 2-5 days, reflecting the initial inflammatory healing response.
Swelling: Localized swelling at the injection site, typically resolving within 3-5 days.
Temporary stiffness: Some patients report joint stiffness for a few days post-injection.

These effects are generally manageable with rest, ice, and acetaminophen. They typically resolve on their own without intervention.

Serious Complications

Serious adverse events with PRP are exceptionally rare — occurring in fewer than 0.1% of patients [15]. The most significant risks include:

Infection: Extremely rare with proper sterile technique. Maintaining a full sterile field during the entire procedure — blood draw, processing, and injection — is essential [15].
Nerve or blood vessel injury: Minimized by ultrasound-guided injection, which allows visualization of surrounding structures.
Worsening of symptoms: Uncommon, but possible if the underlying condition is not appropriate for PRP.

Leukocyte Content and Adverse Events

The composition of PRP affects its side effect profile. A meta-analysis by Kim and colleagues found that leukocyte-poor PRP resulted in 64% lower odds of pain reactions (odds ratio 1.64, p=0.01) and 56% lower odds of swelling (odds ratio 1.56, p=0.02) compared to leukocyte-rich PRP, while maintaining equivalent therapeutic efficacy [41]. This is one reason we tailor the PRP formulation to the specific condition — LP-PRP for joint injections, where minimizing post-injection inflammation is preferred.

Contraindications

PRP may not be appropriate for patients with:

Active infection at the treatment site
Blood disorders affecting platelet function (thrombocytopenia, platelet dysfunction syndromes)
Active cancer or malignancy
Certain blood-thinning medications (discussed on a case-by-case basis)
Systemic infection or sepsis
Pregnancy

Am I a Good Candidate for PRP?

Not every patient is a good candidate for PRP, and part of my job is being honest about that. During your initial evaluation — which in our practice is up to 90 minutes — we do a comprehensive assessment to determine whether PRP is the right approach for your specific situation.

Ideal Candidates

You may be a strong candidate for PRP if you:

Have mild to moderate osteoarthritis (Kellgren-Lawrence grade I-III)
Are dealing with a chronic tendon injury (tennis elbow, patellar tendinopathy, rotator cuff tendinopathy) that hasn’t responded to conservative care
Want to explore options before committing to surgery
Have a sports injury or muscle strain that’s limiting your activity
Are motivated to combine PRP with physical therapy and rehabilitation
Are in generally good health with adequate platelet function

When PRP May Not Be the Right Fit

Advanced, bone-on-bone arthritis (Kellgren-Lawrence grade IV): The evidence is less favorable for severe disease. In these cases, bone marrow concentrate (BMC) or surgical consultation may be more appropriate.
Acute fractures or complete tendon ruptures: These typically require surgical intervention.
Patients who cannot stop NSAIDs: Anti-inflammatory medications interfere with the healing response PRP depends on.
Unrealistic expectations: PRP is designed to support healing and may improve function — it’s not a guaranteed fix.

The Comprehensive Evaluation

The goal during the physical exam is to produce your pain. If I can reproduce what you’re feeling, now I know exactly where to direct the treatment. We use diagnostic ultrasound during the exam to visualize tissue — I can show you exactly what’s going on in your joint, tendon, or ligament in real time.

This is important because pain is rarely caused by just one structure. Medicine is not so simple where it’s just one thing causing you pain. A knee with osteoarthritis may also have associated ligament laxity, patellar tendinopathy, or nerve involvement. We look at the full picture — the full functional unit — and develop a treatment plan that addresses everything we find.

Frequently Asked Questions

How does PRP therapy work? PRP uses a concentrated preparation of your own platelets — drawn from your blood and processed in-clinic — to deliver growth factors directly to damaged tissue. These growth factors stimulate your body’s natural healing cascade: recruiting repair cells, building new tissue, and remodeling damaged structures over a period of weeks to months.

Is PRP injection safe? PRP has an excellent safety profile. Because it’s made from your own blood, the risk of allergic reaction or disease transmission is essentially zero. Serious complications occur in fewer than 0.1% of patients [15]. The most common side effects are temporary soreness and swelling lasting 2-5 days.

How long does PRP injection last? Results vary by condition and severity. For knee osteoarthritis, many patients experience meaningful relief for 6-12 months or longer. High-platelet formulations have shown sustained benefits through 12 months in clinical studies [45]. Tendon injuries may show more durable improvement as the tissue structurally heals.

How much does PRP injection cost? In the United States, PRP typically costs $500-$2,000 per injection depending on location and protocol. Most patients need 1-3 injections over a treatment course. PRP is generally not covered by insurance but may be eligible for HSA/FSA funds.

Is PRP covered by insurance? Currently, most commercial insurance plans, Medicare, and Medicaid classify PRP as investigational and do not cover it [16]. Insurance policies typically lag clinical evidence by 5-10 years. Many patients use HSA or FSA funds to offset costs.

What are the side effects of PRP? The most common side effects are temporary injection site soreness, swelling, and stiffness lasting 2-5 days. These reflect the normal inflammatory healing response. Serious complications are extremely rare (<0.1%) [15].

Is PRP better than cortisone? They work differently. Cortisone provides faster short-term relief by suppressing inflammation but doesn’t support tissue repair. PRP is designed to stimulate healing at the cellular level. Research consistently shows PRP produces better outcomes than cortisone at 6-12 months for conditions like tennis elbow, patellar tendinopathy, and plantar fasciitis [6, 37]. Repeated cortisone use also carries risks of cartilage breakdown.

How many PRP injections do I need? This depends on your specific condition and response to treatment. We evaluate at approximately 3 months post-injection. Some patients achieve their goals with a single injection; others benefit from 2-3 injections. Research suggests three injections reach a therapeutic plateau in most cases [11]. We take it one injection at a time — no pre-sold packages.

Does PRP really work for arthritis? For mild to moderate knee osteoarthritis, the evidence is strong. A 2025 meta-analysis of 3,246 patients found PRP produced superior functional improvement compared to hyaluronic acid, with early-stage disease responding best [5]. For severe, bone-on-bone arthritis, PRP alone may not be sufficient. Patient selection is critical.

What is the success rate of PRP? Recent meta-analyses report clinically meaningful improvement in 50-70% of appropriately selected patients [2, 5, 8]. Success rates are highest when PRP is prepared with adequate platelet concentration, delivered with ultrasound guidance, and applied to mild-to-moderate conditions.

Take the Next Step

If you’ve been dealing with joint pain, a chronic tendon injury, or arthritis that’s been limiting your life, and you’re looking for an option that’s designed to support actual healing rather than just masking symptoms — PRP may be worth exploring.

Every patient is different. Every condition is different. The only way to know if PRP is right for your specific situation is to have a thorough evaluation.

Schedule a free 15-minute discovery call with our office to discuss your condition and find out whether PRP may be an appropriate option for you. No pressure, no sales pitch — just an honest conversation about your options.

Call: (480) 557-9095 Email: PerformanceCenter@protealife.com

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This article is for educational purposes only and does not constitute medical advice. PRP therapy outcomes vary by individual. The information presented reflects current research as of March 2026 and is designed to support informed decision-making. Consult with a qualified healthcare provider to determine whether PRP may be appropriate for your specific condition.

Last updated: March 2026