CMN
Also written as: CMN — Certificate of Medical Necessity
Acronym for Certificate of Medical Necessity; a formal payer-required form attesting to the medical necessity of durable medical equipment for a specific patient.
Full Definition
CMN is the standard abbreviation for Certificate of Medical Necessity, a document class mandated by CMS and many private payers for the reimbursement of DME and related equipment. Editors will encounter the acronym in billing manuals, insurance correspondence, claim denial letters, and clinical program descriptions. It must be expanded at first use. The CMN is distinct from the Letter of Medical Necessity (LMN): the CMN is a standardized form, while the LMN is a narrative letter. Both may be required for complex equipment approval.
Usage
Usage note: Always expand on first use. Distinguish from LMN.
In Context
- "The supplier confirmed that the CMN had been submitted electronically along with the supporting clinical notes." — DME billing correspondence
- "Expand CMN to 'Certificate of Medical Necessity' on first use in any patient-facing or regulatory document." — Editorial style note