| Condition | Evidence Level | Protocol | Success Rate vs Control | Notes |
|---|---|---|---|---|
| Chronic Plantar Fasciitis (>6 months) | Level I (multiple RCTs) | 1–2 injections; ultrasound-guided; 3–4 mL leukocyte-rich PRP | 65–75% pain reduction at 12 months; superior to corticosteroid at 6+ months | Corticosteroid superior short-term (4–8 weeks); PRP superior long-term |
| Insertional Achilles Tendinopathy | Level II | 2–3 injections peritendinous; 3 mL each; 4–6 weeks apart | 60–70% improvement; better than eccentric loading alone for insertional type | Peritendinous (not intratendinous) to avoid tendon rupture risk |
| Non-insertional Achilles Tendinopathy | Level II | 2–3 peritendinous injections | 55–65%; additive benefit when combined with eccentric loading | Eccentric loading remains primary treatment; PRP as adjunct |
| Osteochondral Lesion of Talus (adjunct) | Level III | Intra-articular injection at time of marrow stimulation procedure | Emerging; may improve cartilage repair quality | Adjunct to arthroscopy; not standalone for OLT |
| Ankle Osteoarthritis | Level II | Intra-articular; 3–4 mL; 1–3 injections | 50–65% short-term pain relief; less evidence than knee OA | Useful for mild-moderate OA; delays need for fusion/replacement |
| PRP Type | Platelet Concentration | Leukocyte Content | Best Application | Preparation |
|---|---|---|---|---|
| Leukocyte-Rich PRP (LR-PRP) | 3–8× baseline | High (includes neutrophils, monocytes) | Plantar fasciitis; tendinopathy with degenerative component | Single spin or double spin systems; buffy coat included |
| Leukocyte-Poor PRP (LP-PRP) | 3–8× baseline | Low (leukocytes removed) | Intra-articular (joint) injections; OA; OLT | Double spin with buffy coat removal; cleaner preparation |
| Platelet-Rich Fibrin (PRF) | Variable | Variable; fibrin scaffold | Surgical augmentation; wound healing; tendon repair | No anticoagulant; forms gel; used intraoperatively |
| Whole Blood (Autologous) | 1× (no concentration) | Whole blood composition | Emerging; simpler; lower cost | Simple venipuncture; no centrifuge; evidence developing |
Foot pain isn't resolving?
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Quick Answer:
Quick Answer: PRP (platelet-rich plasma) therapy concentrates the patient’s own growth factors from a blood draw and injects them into tendon or fascial pathology — stimulating a regenerative healing response. Evidence supports PRP for chronic plantar fasciitis and Achilles tendinopathy that has failed conservative management. PRP is not a first-line treatment — it is indicated when 3-6 months of structured conservative care (stretching, orthotics, physical therapy) has failed. Single or series of injections under ultrasound guidance. Most patients notice improvement at 4-8 weeks post-injection.
Platelet-rich plasma (PRP) therapy represents a significant advance in the treatment of chronic tendon and fascia injuries — harnessing the body’s own regenerative biology to stimulate healing in tissue that has failed to recover with conventional treatment. By concentrating platelets and growth factors from the patient’s own blood and injecting them directly into the pathological tissue, PRP therapy initiates a cellular healing cascade in degenerated tendons and fascia. At Balance Foot & Ankle PLLC, Dr. Tom Biernacki offers PRP therapy as part of a comprehensive treatment strategy for chronic foot and ankle tendon conditions.
How PRP Works
A small blood draw (20–40 mL) is centrifuged to separate plasma — the platelet-rich layer is extracted and concentrated to 5–8x baseline platelet concentration. The resulting PRP contains concentrated growth factors including PDGF, TGF-β, VEGF, and IGF-1 — all of which play central roles in tissue repair and collagen remodeling. The PRP is injected under ultrasound guidance directly into the area of tendon degeneration or fascial pathology. The concentrated growth factors stimulate tenocyte activity, collagen synthesis, and neovascularization — initiating a regenerative rather than inflammatory healing response.
Indications and Evidence
Chronic Plantar Fasciitis: Multiple randomized controlled trials demonstrate PRP superiority over corticosteroid injection at 3-, 6-, and 12-month follow-up — with more durable pain reduction and lower recurrence rates. PRP is indicated for plantar fasciitis failing 3-6 months of conservative management (stretching, orthotics, physical therapy) before surgical consideration. Chronic Insertional and Non-insertional Achilles Tendinopathy: Evidence supports PRP for degenerated Achilles tendon that has failed structured eccentric loading programs. Peroneal Tendinopathy: Emerging evidence for PRP in peroneal tendon degeneration. Fat Pad Atrophy: Investigational use with promising preliminary results for stimulating fat pad regeneration.
The Procedure and Recovery
PRP injection is an office procedure — no sedation required. Blood draw, centrifugation (15 minutes), and ultrasound-guided injection of the prepared PRP. Expect a temporary post-injection flare (24–72 hours of increased soreness) as the growth factors initiate the healing cascade. Activity restriction for 1-2 weeks after injection. Progressive return to activity over 4-6 weeks. Most patients notice meaningful improvement at 4-8 weeks. A second injection at 6 weeks may be recommended for partial responders.
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Begin night splint use after the acute PRP flare period (first 72 hours) has resolved
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Rocker board for sustained calf and plantar fascia stretching — essential during the 4-8 week PRP recovery phase to maintain tissue compliance and support the regenerative healing process.
Dr. Tom says: “My podiatrist recommended ProStretch during my PRP therapy and the daily stretching significantly improved my plantar fascia flexibility.”
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Begin gentle stretching after the acute PRP flare (72-hour period) has resolved
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✅ Pros / Benefits
- PRP provides more durable plantar fasciitis relief than cortisone at 6 and 12 months
- Uses patient’s own blood — no foreign material, no systemic drug effects
- Ultrasound guidance ensures precise delivery to the area of degeneration
- Office procedure — no sedation, same-day return home
❌ Cons / Risks
- Temporary post-injection flare (24-72 hours) — expect increased soreness before improvement
- Not covered by most insurance — typically $400-800 per injection out of pocket
- Not indicated as first-line — most effective for chronic cases failing 3-6 months of conservative care
Dr. Tom Biernacki’s Recommendation
PRP is one of the most rewarding treatments I offer because it’s indicated for exactly the patients who are most frustrated — those who’ve done everything right for 6 months and still can’t walk without heel pain. The evidence for PRP over cortisone in chronic plantar fasciitis is now solid — better pain outcomes at 6 and 12 months, lower recurrence rate. I counsel patients on the post-injection flare so they’re not alarmed, and most notice meaningful improvement at the 6-week mark.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
Is PRP covered by insurance for plantar fasciitis?
PRP for plantar fasciitis is typically not covered by standard insurance plans — it is considered investigational by most payers despite strong clinical evidence. Costs range from approximately $400–800 per injection out of pocket depending on the facility. Some HSA and FSA accounts cover PRP. Dr. Biernacki discusses insurance status and out-of-pocket cost before proceeding with PRP therapy so patients can make an informed decision.
How many PRP injections are needed for plantar fasciitis?
Most plantar fasciitis PRP protocols begin with a single injection, with evaluation at 6 weeks. Partial responders may benefit from a second injection at the 6-week visit. The majority of patients see meaningful improvement with one injection. The full benefit develops over 3–4 months as collagen remodeling and tissue regeneration occur. PRP is not a quick fix — it initiates a biological healing process that takes time to reach its full effect.
What is the difference between PRP and cortisone for heel pain?
Cortisone injection: rapid relief (days to 2 weeks), anti-inflammatory mechanism, lasts 2-4 months on average, risk of fat pad atrophy with repeated injections, does not address underlying tissue degeneration. PRP: slower onset (4-8 weeks), regenerative mechanism promoting actual tissue healing, more durable long-term relief (studies show superiority at 6 and 12 months), no fat pad atrophy risk. For acute heel pain needing rapid relief: cortisone. For chronic plantar fasciitis failing conservative care: PRP is the superior option.
Can PRP help Achilles tendinopathy?
Yes — PRP has good evidence for chronic Achilles tendinopathy that has failed structured eccentric loading (Alfredson protocol) for 3-6 months. Both insertional (at the calcaneal attachment) and non-insertional (mid-substance) Achilles tendinopathy respond to PRP, with non-insertional typically showing better outcomes. PRP is combined with continued eccentric loading during recovery — the mechanical stimulus and growth factor delivery work synergistically for tendon regeneration.
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Frequently Asked Questions
When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)