Letter of Medical Necessity for a Gym Membership

Published July 15, 2026

A gym membership can qualify as an HSA or FSA eligible expense when a licensed clinician determines that structured exercise is medically appropriate for a diagnosed condition and documents it in a letter of medical necessity. Without that documentation, a gym membership is a general expense. With it, it may be reimbursable as a medical one.

Why exercise can be a medical intervention

Structured physical activity is a frontline clinical recommendation for a wide range of diagnosed conditions. Cardiovascular disease, hypertension, type 2 diabetes, obesity, musculoskeletal disorders, depression, and anxiety all have substantial clinical evidence supporting aerobic exercise as part of their management.

That is the basis for an LMN. Not that a gym membership is inherently a medical expense, but that for patients with certain diagnosed conditions, a clinician can review the full picture of someone's health and determine that regular structured exercise is medically appropriate for them specifically as part of their management plan.

What conditions may qualify

Common diagnosed conditions where exercise may be clinically relevant include cardiovascular disease and hypertension, type 2 diabetes and metabolic disorders, obesity, musculoskeletal conditions including chronic back pain and arthritis, depression and anxiety disorders, and chronic pain and inflammation.

Qualifying is not about being generally unhealthy or wanting to get in better shape. It depends on a documented diagnosis and a clinician's judgment that a gym membership addresses a real clinical need. Some conditions may also disqualify someone from being eligible, for example, recent injuries where exercise is contraindicated for now.

What the LMN covers

When a Root Cause clinician issues an LMN for a gym membership, it documents your diagnosed condition, the clinical rationale for why structured exercise is medically appropriate for your situation, and the ICD-10 code tied to that condition. It is valid for 12 months at the location it was issued for. A different gym or studio requires its own review.

One practical note: most HSA and FSA cards will be declined at the gym's point of sale since memberships are not automatically categorized as medical expenses. The standard path is to pay out of pocket and submit for reimbursement with your LMN and receipt.