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Fsa hsa

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Letter of medical necessity for supplements: example, who can write one, and how to use your FSA

fsa hsa

Letter of medical necessity for supplements: example, who can write one, and how to use your FSA

What is a Letter of Medical Necessity (LMN)? A plain-English guide with a sample letter, what it must include, how to get one, and how to use it with your FSA or HSA.

Seya Health Editorial Team11 min read Sep 9, 2026