What is a Letter of Medical Necessity?

A letter of medical necessity (LMN) is a letter written by your doctor that verifies the services or items you purchase for the diagnosis, treatment, or prevention of a disease or medical condition. This letter must be updated annually and must be dated prior to incurring services or purchasing items. Refer to Eligible Expenses.

The letter should include the following:

  1. The type of treatment or item purchased
  2. The specific medical condition/need requiring the treatment/expense
  3. The letter must be dated prior to incurring the services or purchasing items
  4. Letters of Medical Necessity are good for one year. You will need an updated letter each year if the necessity expands over a year.*

*Letters from chiropractors only qualify if they are able to diagnose and treat the medical condition.