What is a Letter of Medical Necessity?
Edited
A Letter of Medical Necessity (LMN) is a formal document that a licensed healthcare provider writes to explain why a specific treatment, product, or service is essential for a patient's health.
A health plan may request an LMN as part of a certification or utilization review process to determine if a requested medical expense is covered. Health insurance providers, health savings accounts (HSAs), or flexible spending accounts (FSAs) may also request an LMN before reimbursing an expense.
The IRS defines a medical expense as, the costs of diagnosis, cure, mitigation, treatment, or prevention of disease, and for the purpose of affecting any part or function of the body.
Letter of Medical Necessity
LMN
HSA
FSA
IRS