Medicare-Covered Alternatives to Knee Replacement Surgery

Knee pain is one of the most common reasons Medicare beneficiaries visit a doctor. While knee replacement surgery is covered by Medicare when medically necessary, it is a major procedure with a significant recovery period. Many patients and their doctors prefer to try conservative, non-surgical treatments first. The good news is that Medicare covers several of these alternatives, though coverage rules vary by treatment type.

Medicare-Covered Alternatives to Knee Replacement

Cortisone (Corticosteroid) Injections

Cortisone injections are one of the most commonly used non-surgical treatments for knee osteoarthritis and inflammation. Medicare Part B covers corticosteroid injections when they are medically necessary and administered by a Medicare-enrolled provider. The injection reduces inflammation in the joint and can provide significant pain relief for weeks to months. Most doctors limit cortisone injections to three or four per year per joint because repeated high-dose injections can accelerate cartilage breakdown over time.

Hyaluronic Acid Injections (Viscosupplementation)

Hyaluronic acid injections, sometimes called viscosupplementation, are used to lubricate the knee joint and reduce pain from osteoarthritis. Brand names include Synvisc, Synvisc-One, Euflexxa, Orthovisc, and Hyalgan. Medicare Part B covers these injections for osteoarthritis of the knee when medically necessary. A series of injections is typically given over three to five weeks, though single-injection formulations are also available.

If you have a Medicare Advantage plan, be aware that some plans require prior authorization before approving hyaluronic acid injections. Always check with your plan before scheduling the procedure to avoid unexpected costs.

Physical Therapy

Physical therapy is one of the most evidence-based treatments for knee pain and is strongly recommended by orthopedic guidelines before considering surgery. Medicare Part B covers physical therapy services when they are medically necessary, ordered by a physician, and provided by a licensed physical therapist. Since 2018, there is no annual dollar cap on covered physical therapy services, though a therapist must certify that continued treatment is medically necessary.

A typical physical therapy program for knee osteoarthritis focuses on strengthening the muscles around the knee, improving flexibility and range of motion, and teaching techniques to reduce joint stress during daily activities. Studies consistently show that structured physical therapy can delay or eliminate the need for knee replacement surgery in many patients.

Genicular Nerve Block and Radiofrequency Ablation

A genicular nerve block is an injection that targets the nerves supplying sensation to the knee joint. It is used both as a diagnostic tool and as a pain management treatment for patients who are not good candidates for surgery or who want to avoid it. Medicare Part B covers genicular nerve blocks when medically necessary for chronic knee pain.

Radiofrequency ablation (RFA) of the genicular nerves uses heat to disrupt pain signals from the knee. It can provide longer-lasting relief than a nerve block alone, often six months to two years. Medicare coverage for RFA of the knee nerves is evaluated on a case-by-case basis based on medical necessity. As of 2026, CMS has expanded acceptance of this procedure, and many Medicare Administrative Contractors (MACs) now have local coverage determinations (LCDs) supporting it.

What Medicare Does Not Cover for Knee Pain

• Platelet-rich plasma (PRP) injections: Medicare does not cover PRP injections for knee pain. CMS considers PRP experimental for musculoskeletal conditions because clinical evidence has not consistently demonstrated superiority over other covered treatments.

• Stem cell therapy: Not covered for knee conditions. The FDA has not approved stem cell injections for knee osteoarthritis, and Medicare only covers FDA-approved treatments.

• Prolotherapy: Injections of irritant solutions to stimulate healing are not covered by Medicare.

• Acupuncture for knee pain: Medicare currently covers acupuncture only for chronic low back pain. Coverage for knee pain has not been extended as of 2026.

• Over-the-counter supplements: Glucosamine, chondroitin, turmeric, and similar supplements are not covered by Medicare Part B or Part D.

• Experimental devices: Unproven devices or treatments not approved by the FDA or not supported by Medicare coverage determinations are not covered.

How Medigap and Medicare Advantage Affect Your Costs

With Original Medicare alone, you pay 20% of the Medicare-approved amount for all covered outpatient knee treatments after meeting the Part B deductible. For patients undergoing multiple injections or extended physical therapy, these costs can add up. A Medigap plan such as Plan G covers the Part B 20% coinsurance, meaning you pay nothing out of pocket for covered treatments after your annual Part B deductible.

Medicare Advantage plans cover the same treatments as Original Medicare but may require prior authorization for injections and may limit your choice of physical therapists to in-network providers. Some Medicare Advantage plans offer additional benefits such as over-the-counter allowances that can be used for pain relief products, though these do not cover the injections themselves.

Frequently Asked Questions