Frequently Asked Questions
Does Medicare cover treatment for osteoarthritis?
Yes — Medicare Part B covers a comprehensive range of osteoarthritis treatments including physical therapy, cortisone injections, hyaluronic acid injections (when covered), and specialist visits. Medicare Part A covers joint replacement surgery when medically necessary. The exact cost-sharing depends on which part covers the service and whether you have supplemental insurance.
Does Medicare cover knee injections for osteoarthritis?
Medicare Part B covers corticosteroid (cortisone) injections for knee osteoarthritis — typically 3–4 per year. Hyaluronic acid (HA) injections (Synvisc, Orthovisc) are covered by Medicare but have received mixed coverage decisions; coverage varies by plan and may require prior authorization. Platelet-rich plasma (PRP) injections are generally not covered by Medicare as they are considered investigational.
Does Medicare cover physical therapy for arthritis?
Yes — Medicare Part B covers outpatient physical therapy for osteoarthritis with no annual visit limit for medically necessary treatment. PT is the most evidence-backed non-surgical treatment for knee and hip OA — multiple studies show it reduces pain and improves function as effectively as surgery for mild to moderate osteoarthritis. You pay 20% coinsurance after the Part B deductible.
Does Medicare cover knee replacement surgery?
Yes — Medicare Part A covers knee replacement (total knee arthroplasty) when medically necessary. Coverage includes the hospital stay, surgeon fees, anesthesia, and rehabilitation. You pay the Part A deductible ($1,676 in 2026) plus 20% of surgeon fees. With Medigap Plan G, your total out-of-pocket is limited to the $257 Part B deductible.
What is the best treatment for knee osteoarthritis in seniors?
Current guidelines recommend a stepped approach: start with physical therapy and exercise (strongest evidence, no surgical risks), add topical NSAIDs (Voltaren gel) for additional pain relief, use corticosteroid injections for moderate flares, and consider joint replacement when functional limitations significantly impact quality of life despite conservative treatment. Avoid delaying PT and exercise — they are more effective the earlier they are started.
Osteoarthritis affects 30% of adults over 65 — making it the most common joint disease in older Americans. The good news: Medicare covers the full spectrum of evidence-based treatment, from physical therapy to cortisone injections to joint replacement surgery. Understanding your coverage helps you access appropriate care at the right time.
The Treatment Ladder — Medicare Covers All Steps
Step 1: Physical Therapy and Exercise (First-Line)
Physical therapy is the most evidence-backed treatment for knee and hip osteoarthritis. Multiple randomized controlled trials show PT reduces pain and improves function as effectively as surgery for mild to moderate OA. Medicare Part B covers PT when prescribed by your doctor — no visit limit for medically necessary treatment. A PT program for OA typically includes strengthening the muscles around the joint (reduces load on cartilage), gait and movement training, and an independent home exercise program.
Step 2: Topical Medications
Topical diclofenac gel (Voltaren, now OTC) is first-line pharmacotherapy for knee OA according to American College of Rheumatology guidelines. It delivers anti-inflammatory medication directly to the joint with minimal systemic absorption — safer than oral NSAIDs for seniors. Medicare Part D covers prescription-strength topical NSAIDs when prescribed by your doctor.
Step 3: Corticosteroid (Cortisone) Injections
Medicare Part B covers cortisone injections for knee and hip osteoarthritis when administered by a physician. Typically limited to 3–4 per joint per year. Cortisone provides significant short-term pain relief (4–12 weeks) — particularly useful for acute flares that limit participation in PT. Long-term frequent use may accelerate cartilage breakdown; use is typically limited to moderate frequency.
Step 4: Joint Replacement Surgery
When conservative treatment has been tried adequately and pain significantly limits daily activities, joint replacement is highly effective with excellent Medicare coverage. Medicare Part A covers the hospital stay and Part B covers surgeon fees. See our complete joint replacement coverage guide for detailed cost information.
What You Pay — Cost Summary
| Treatment | With Original Medicare | With Medigap Plan G |
|---|---|---|
| Physical therapy visits | 20% coinsurance | $0 after deductible |
| Cortisone injection | 20% coinsurance | $0 after deductible |
| Knee replacement (total) | $3,000–$6,000 | $257 only |
| Post-surgery PT | 20% coinsurance | $0 after deductible |
- Ask your doctor for a PT referral first — exercise therapy should precede injections or surgery
- Try Voltaren gel (topical diclofenac, now OTC) before oral NSAIDs for knee pain
- Cortisone injections are covered by Medicare — most effective for acute flares limiting PT participation
- Do not delay surgery indefinitely if conservative treatment has been tried and quality of life is significantly impaired
- With Medigap Plan G, all covered treatment costs reduce to $0 after the annual $257 deductible