RARC N661: Documentation does not support that the services rendered were medically necessary.

Documentation does not support that the services rendered were medically necessary.

Common CARC pairings

RARCs like N661 ride alongside CARCs on the 835 electronic remittance advice. These are the CARC denials RARC N661 is most often paired with.

CARC	Meaning
50	These are non-covered services because this is not deemed a 'medical necessity' by the payer. Usage: Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present.
P21	Payment denied based on the Medical Payments Coverage (MPC) and/or Personal Injury Protection (PIP) Benefits jurisdictional regulations, or payment policies. Usage: If adjustment is at the Claim Level, the payer must send and the provider should refer to the 835 Insurance Policy Number Segment (Loop 2100 Other Claim Related Information REF qualifier 'IG') if the jurisdictional regulation applies. If adjustment is at the Line Level, the payer must send and the provider should refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment information REF) if the regulations apply. To be used for Property and Casualty Auto only.