PRP Therapy for Achilles Tendonitis
Ultrasound-guided platelet-rich plasma injections for chronic Achilles tendinopathy — targeting the degenerated tendon to relieve pain and restore push-off strength without surgery.
How PRP for Achilles Tendonitis Works
1. Draw
A small sample of your own blood is drawn — the same as a routine lab draw.
2. Concentrate
It is spun in a centrifuge to concentrate the platelets and growth factors 5–7× above baseline.
3. Inject (ultrasound-guided)
Dr. Birch (RMSK) injects the PRP precisely into the injured tissue under real-time ultrasound.
Dr. Jonathan Birch (NMD, RMSK) has performed thousands of ultrasound-guided regenerative injections. Real-time imaging means the PRP reaches the exact tissue that needs it — not just the general area.
Important: PRP therapy is generally not covered by insurance and is fee-for-service at Purety Clinic. We provide transparent pricing at consultation and a superbill you may submit for potential out-of-network reimbursement.
Why PRP for Achilles Tendinopathy
The Achilles is the strongest tendon in the body, but it has a thin blood supply — especially in the "mid-portion" a few centimeters above the heel. Chronic Achilles pain is usually tendinosis: collagen breakdown and disorganized fibers from repetitive load, not simple inflammation. That poor blood supply is exactly why these injuries linger for months and resist rest and stretching.
PRP supplies a concentrated dose of growth factors directly into the degenerated tendon, jump-starting a repair response the tendon cannot mount on its own. The aim is to relieve pain and rebuild healthier tendon tissue so you can return to walking, running, and push-off activity.
Precision and safety both depend on imaging here — the Achilles is superficial and you never want to inject into the tendon body carelessly. Dr. Birch (RMSK) uses real-time ultrasound to map the area of degeneration and guide the PRP to the right plane around and within the tendon.
What the Research Shows
Evidence for PRP in Achilles tendinopathy is mixed but evolving. Some randomized trials of mid-portion Achilles tendinopathy found PRP added little over a structured eccentric-exercise program alone, while other studies and real-world series — particularly with ultrasound-guided injection, higher platelet concentrations, and combined rehab — report meaningful pain relief and improved function in chronic cases that had failed conservative care.
The consensus is that PRP is best viewed as part of a program: it works better paired with a proper loading-rehab protocol than as a standalone shot. It is generally reserved for chronic tendinopathy that has not responded to several months of appropriate conservative treatment.
PRP is a procedure, not an FDA-approved drug, and individual response varies. We set honest expectations and only recommend it when it is a reasonable fit for your specific tendon.
Who Is a Candidate for PRP for Achilles Tendonitis?
- Chronic mid-portion or insertional Achilles tendinopathy lasting more than 3 months
- Pain and stiffness with walking, running, or push-off that limits activity
- Failed a proper course of eccentric-loading rehab, rest, and activity modification
- Willing to combine the injection with a structured tendon-loading program
- No active infection, untreated bleeding disorder, or full Achilles rupture (which needs surgical evaluation)
Final candidacy is determined at consultation by Dr. Birch after review of your history, exam, and any imaging. PRP is not right for every patient, and we will tell you directly when it is not the best tool for your injury.
What the Achilles Tendonitis Protocol Looks Like
A typical Achilles protocol is 1–2 ultrasound-guided PRP injections spaced about 4–6 weeks apart, always paired with a progressive loading-rehab program. Each visit takes roughly 45–60 minutes — blood draw, centrifuge spin, and the guided injection. We give you specific guidance on weight-bearing and activity for the days afterward.
Because the early inflammatory response is part of the healing process, we ask you to avoid anti-inflammatory medication during the recovery window. Tendon remodeling is slow, so improvement builds over 6–12 weeks and often continues beyond. Return to running is gradual and guided by symptoms and follow-up exam.
Want the full picture on PRP & regenerative medicine?
See our complete overview of PRP, stem cell, and prolotherapy injections — how each works, what to expect, and the conditions we treat.
Read the Full PRP OverviewFrequently Asked Questions: PRP for Achilles Tendonitis
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Two Licensed Naturopathic Medical Doctors. One Practice.
The naturopathic medical doctors caring for our patients at Purety Family Medical Clinic.
Dr. Jonathan Birch, NMD, RMSK
Founder · Naturopathic Medical Doctor
Licensed Naturopathic Medical Doctor and Registered in Musculoskeletal Sonography. Practicing root-cause integrative medicine since 2014. Areas of focus include FMT and microbiome restoration, hormone and thyroid optimization, autoimmune and Long COVID protocols, ozone and IV nutrient therapy, and PRP and regenerative injections.
Read Dr. Birch's full bioDr. Dena Birch, NMD
Naturopathic Medical Doctor · Women's Health & Pediatrics
Licensed Naturopathic Medical Doctor leading our women's health and holistic pediatric care. Areas of focus include perimenopause and bioidentical hormone therapy, PCOS and thyroid, fertility support, pediatric eczema, immune issues and recurrent infections, and gentle well-child care for families.
Read Dr. Dena's full bioDiscuss PRP for Achilles Tendonitis with Dr. Birch
Call (805) 500-8300 or submit a consultation request. Remote consultations available for patients outside Santa Barbara.
(805) 500-8300