What Is a Certification of Medical Necessity (CMN)?

A Certification of Medical Necessity (CMN) is a formal document your doctor completes to prove to Medicare or another insurer that you need a specific service, supply, or piece of Durable Medical Equipment (DME). It explains your diagnosis and provides the clinical justification for the prescription.

Why It Matters

A CMN is the key to getting coverage. Without a complete and accurate CMN, an insurer may deny a claim, leaving you with a large bill. It's often required before an insurer will approve a prior authorization.

How Mira Mace Can Help

Our advocates are experts in CMN requirements. We work directly with your doctor's office to ensure the paperwork is filled out correctly and submitted on time. If a claim is denied due to CMN issues, we manage the appeal process for you.