RARC M60: Missing or Invalid Certificate of Medical Necessity

What Does RARC M60 Mean?

M60 appears when the payer cannot process a claim because the Certificate of Medical Necessity is absent, incomplete, or fails to meet validation requirements. CMNs are standardized forms that document the clinical justification for certain items and services — most commonly durable medical equipment (DME), prosthetics, orthotics, and supplies. Medicare and many other payers require these forms to confirm that the item is medically necessary for the patient's condition and that the ordering physician has attested to that need.

The CMN requirement is not just a formality. Each DME category has a specific CMN form (such as CMS-484 for oxygen equipment or CMS-846 for pneumatic compression devices), and the form must be completed by the ordering physician with clinical details that match the item being billed. A CMN that is filled out by the wrong provider, references the wrong equipment category, or has incomplete clinical fields will trigger this remark just as surely as a completely missing form.

This remark code frequently accompanies CARC 16 (claim lacks information needed for adjudication) or CARC 252 (additional information required). In the DME space, M60 is one of the more common reasons for claim holds, and suppliers who bill high volumes of equipment should treat it as a process-level issue rather than a one-off documentation gap.

What to Do

Determine which CMN form is required for the billed item and verify whether one is on file. If the CMN was never obtained, contact the ordering physician's office to have the appropriate form completed with current clinical information and the physician's signature. If the CMN exists but was not attached or linked to the claim, correct the submission to include the CMN reference and resubmit.

For organizations that regularly bill DME or supplies requiring CMNs, building a tracking system that flags orders without completed CMNs before claims are generated can significantly reduce M60 denials. Some billing systems allow you to set hard stops that prevent claim submission when the CMN indicator field is empty. Additionally, verify that CMN expiration dates have not passed — many CMNs are valid for a limited period and must be recertified, and an expired CMN will be treated the same as a missing one.

Common Scenarios

• A DME supplier ships a new CPAP machine but submits the claim before the ordering physician has returned the signed CMS-484 form, resulting in an M60 denial for missing CMN.
• A home medical equipment company bills for oxygen supplies using an outdated CMN that expired three months ago, and the payer rejects the claim until a recertification CMN is provided.
• A supplier's billing system fails to attach the CMN reference number to the electronic claim, so even though the form is on file internally, the payer cannot locate it and returns M60.

Commonly Paired With

RARC M60 commonly appears alongside these CARC denial codes: