CARC & RARC Denial Code Lookup
Search Claim Adjustment Reason Codes (CARC) and Remittance Advice Remark Codes (RARC) to understand why a claim was denied or adjusted — and what to do next.
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- A1 Claim/service denied — generic code, use only when no more specific code applies
- B15 Qualifying service/procedure has not been received/adjudicated
- B16 'New patient' qualifications were not met
- B7 Provider not certified/eligible to be paid for this procedure/service on this date
- B9 Patient is enrolled in a Hospice
- CO-10 Diagnosis inconsistent with the patient's gender
- CO-100
- CO-101
- CO-102
- CO-103
- CO-104
- CO-105
- CO-106
- CO-107
- CO-108
- CO-109 Claim not covered by this payer/contractor — send to correct payer
- CO-11 Diagnosis inconsistent with the procedure
- CO-110
- CO-111
- CO-112
- CO-113
- CO-114
- CO-115
- CO-116
- CO-117
- CO-118
- CO-119 Benefit maximum for this time period or occurrence has been reached
- CO-12 Diagnosis inconsistent with the provider type
- CO-120
- CO-121
- CO-122
- CO-123
- CO-124
- CO-125
- CO-126
- CO-127
- CO-128
- CO-129
- CO-13 The date of death precedes the date of service
- CO-130
- CO-131
- CO-132
- CO-134
- CO-135
- CO-137
- CO-138
- CO-139 Contracted funding agreement — subscriber employed by the provider of services
- CO-14 The date of birth follows the date of service
- CO-140
- CO-141
- CO-142
- CO-143
- CO-144
- CO-145
- CO-146 Diagnosis was invalid for the date(s) of service reported
- CO-147 Provider contracted/negotiated rate expired or not on file
- CO-148
- CO-149
- CO-15
- CO-150 Payer deems the information submitted does not support this level of service
- CO-151 Payer deems the information submitted doesn't support this many/frequency of services
- CO-152 Payer deems the information submitted does not support this length of service
- CO-153 Payer deems the information submitted does not support this dosage
- CO-154 Payer deems the information submitted does not support this day's supply
- CO-155
- CO-156
- CO-157
- CO-158
- CO-159
- CO-16 Claim lacks information needed for adjudication
- CO-160
- CO-161
- CO-162
- CO-163 Attachment/other documentation referenced on the claim was not received
- CO-164 Attachment/other documentation referenced on the claim was not received in a timely fashion
- CO-165
- CO-166
- CO-167 This diagnosis is not covered — missing/incomplete/invalid diagnosis
- CO-168
- CO-169
- CO-17
- CO-170
- CO-171
- CO-172
- CO-173
- CO-174
- CO-175
- CO-176
- CO-177
- CO-178
- CO-179
- CO-18 Duplicate claim or service
- CO-180
- CO-181 Procedure code was invalid on the date of service
- CO-182 Procedure modifier was invalid on the date of service
- CO-183 The referring provider is not eligible to refer the service billed
- CO-184
- CO-185 The rendering provider is not eligible to perform the service billed
- CO-186
- CO-187