Osteoarthritis

32M Americans have osteoarthritis. Strength and mobility training reduces pain and improves function — and is reimbursable from your HSA/FSA.

The Quick Take

If you've been diagnosed with osteoarthritis (ICD-10: M19.9), your HSA or FSA can reimburse:

• Gym/health club membership
• Personal training (low-impact focused)
• Aquatic exercise / pool membership
• Yoga and Pilates
• And more (see full list below)

The catch is documentation. Specifically, a Letter of Medical Necessity from your physician confirming that exercise is part of your treatment plan. Without it, FSA/HSA administrators reject most claims for fitness expenses. With it, most admin reimbursements process within 7-14 days of submission.

Why Exercise Is Medically Necessary for Osteoarthritis

OARSI and ACR guidelines list low-impact strength training and aerobic exercise as core OA treatment. Exercise reduces pain, slows progression, and delays joint replacement need.

This isn't a stretch interpretation — it's standard medical practice. Your physician already knows it. The IRS already accepts it (under Publication 502, Section 213). HSA and FSA administrators already process it. The only thing missing for most patients is the right paperwork.

What's Reimbursable

With a properly documented Letter of Medical Necessity for osteoarthritis, the following are typically covered by FSA/HSA:

Gym/health club membership. Documented when used as part of treatment for osteoarthritis. Personal training (low-impact focused). Documented when used as part of treatment for osteoarthritis. Aquatic exercise / pool membership. Documented when used as part of treatment for osteoarthritis. Yoga and Pilates. Documented when used as part of treatment for osteoarthritis. Stationary bike (low-impact aerobic). Documented when used as part of treatment for osteoarthritis. Resistance bands. Documented when used as part of treatment for osteoarthritis.

Reimbursement is determined by your specific FSA/HSA administrator. The most common administrators (HealthEquity, Optum Bank, Lively, Fidelity, WageWorks, Inspira) all process LMN-supported claims for these services.

What Documentation You Need

Your Letter of Medical Necessity should include:

1. Diagnosis: Osteoarthritis (M19.9 (Osteoarthritis, unspecified), M17.9 (Knee), M16.9 (Hip))
2. Brief clinical history: How long you've had the condition, current treatment context
3. Recommended exercise/treatment: Specific (gym membership, personal training, etc.) — not vague ("exercise")
4. Why it's medically necessary: One or two clinical sentences justifying the recommendation
5. Duration: Typically 12 months
6. Physician credentials and signature: Name, NPI, signature, date

A clean, properly-formatted LMN takes your physician under a minute to review and sign — once it's prepared correctly. Most rejections happen at the LMN format level, not the medical necessity level.

How to Start

1. Confirm the diagnosis is on your medical record. Log into your patient portal — if you've been seen for osteoarthritis in the last 12 months, you're set.
2. Prepare your packet. Clinical summary, draft Letter of Medical Necessity, and patient portal message. DoctorNoted builds all three in 5 minutes.
3. Send to your own primary care physician. Through your existing patient portal — no awkward calls.
4. Submit the signed letter to your FSA/HSA administrator along with your receipts.

Your packet is compliance-reviewed and delivered in under 1 hour — not days. Each one is built specifically for your condition and reviewed by our team before it reaches you. From there, your doctor reviews and signs (their pace, not ours), and your FSA/HSA admin processes the reimbursement on their schedule. Average annual reimbursement once your letter is on file: $1,500-$3,000.

This page is for educational purposes only and is not medical, legal, or tax advice. Consult your physician about your specific health situation, your tax advisor about your tax situation, and your HSA/FSA administrator about reimbursement eligibility. DoctorNoted is not a medical provider and does not determine medical necessity — your physician retains full clinical discretion.