Medicare denials: read the remittance before you appeal

Start with the entire remittance

A zero payment is not a complete explanation. Medicare remittance advice describes adjustments to a claim or service line, including denials, partial payments and other changes. Read the adjustment group, Claim Adjustment Reason Code (CARC), accompanying Remittance Advice Remark Codes (RARCs), and any contractor instructions together.

A CARC explains why a payment differs from the billed amount. A RARC supplies additional information or a remittance-processing message. Do not turn one code into a blanket rule for every payer or service; code lists and contractor instructions can change.

Separate the reason from the next action

For a medical-necessity denial, review the coverage policy that applied to the service and date, including any relevant National Coverage Determination or Local Coverage Determination. Ask the clinical team to assess whether its documentation supports those requirements. A denial code alone cannot establish that an appeal should succeed.

For missing or invalid information, compare the submitted claim with the actual record and the contractor's instructions. A rejected or unprocessable claim may require correction rather than a redetermination. Confirm that distinction before sending an appeal packet or resubmitting a duplicate claim.

• Record the claim number, payer, service date and denied amount.
• Capture the complete CARC/RARC combination and notice date.
• Identify the applicable policy and the specific missing evidence.
• Confirm the correction, reopening or appeal path with the contractor.
• Assign an owner and a follow-up date.

Keep the tracking record separate from the evidence

In ClaimDesk, use claim numbers and non-PHI status notes to track Pending, Submitted, Won or Lost and any recovered amount. Keep clinical records, beneficiary identifiers and actual payer correspondence in your office's approved secure system—not in ClaimDesk or an AI prompt.

A useful status note records the action taken, the submission confirmation and what happens next. Avoid treating a payment adjustment as an appeal win until you reconcile the decision and payment.