Browse all standardized Remark Codes (RARC) used on Medicare, Medicaid, and commercial payer remittance advice (835 ERA / EOB). Each code includes its RA835 mapping, adjustment group, reason code, and a dedicated resolution guide.
Browse Claim Adjustment Reason Codes — the codes that explain why a payment was reduced or denied.
| Remark Code | Description | RA835 Code | Group | Reason Code | |
|---|---|---|---|---|---|
| B23 | PROCEDURE BILLED IS NOT AUTHORIZED PER YOUR CLINICAL LABORATORY IMPROVEMENT AMENDMENT (CLIA) PROFIC… |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | B23 | View → |
| B4 | LATE FILING PENALTY. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | B4 | View → |
| B5 | COVERAGE/PROGRAM GUIDELINES WERE NOT MET OR WERE EXCEEDED. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | 272 | View → |
| B7 | THIS PROVIDER WAS NOT CERTIFIED/ELIGIBLE TO BE PAID FOR THIS PROCEDURE/SERVICE ON THIS DATE OF SERV… |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | B7 | View → |
| B8 | ALTERNATIVE SERVICES WERE AVAILABLE, AND SHOULD HAVE BEEN UTILIZED. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | B8 | View → |
| B9 | PATIENT IS ENROLLED IN A HOSPICE. | — | CO | B9 | View → |
| BCR | CLAIM HAS BEEN MISDIRECTED. FOR BEHAVIORAL HEALTH DATES OF SERVICE PRIOR TO 10/15/14 PLEASE SUBMIT… |
N418
Misrouted claim. See the payer's claim submission ins… |
CO | 109 | View → |
| BH3 | SERVICES LIMITED TO 3 UNITS PER DAY |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| BHCP | NON-CONTRACTED CODE. PLEASE CONTACT BHCP AT 1-855-481-7047 FOR QUESTIONS REGARDING YOUR CONTRACT A… |
M25
The information furnished does not substantiate the ne… |
CO | 16 | View → |
| BHF | MAXIMUM FREQUENCY ONE UNIT PER MEMBER PER DAY |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| BHUL | NON-CONTRACTED CODE |
M25
The information furnished does not substantiate the ne… |
CO | 16 | View → |
| BIER | CLAIM BILLED IN ERROR PER NOTIFICATION FROM PROVIDER, PLEASE DISREGARD. |
MA130
Your claim contains incomplete and/or invalid informat… |
CO | 129 | View → |
| BIL | BILLED CHARGES ARE INELIGIBLE AS A CORRECTED CLAIM/INFORMATION HAS BEEN RECEIVED. |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| BLOD | THE PLAN DOES NOT PROVIDE BENEFITS FOR ANY BLOOD, BLOOD DONORS, OR PACKED RED BLOOD CELLS WHEN PART… | — | CO | 66 | View → |
| BLT | PROCEDURE IS NOT VALID WHEN BILLED ON HCFA FORM OR WITH THE TYPE OF BILL CODE USED. |
MA30
Missing/incomplete/invalid type of bill. |
CO | 282 | View → |
| BP | CODE IS A BILATERAL PROCEDURE CODE, REIMBURSEMENT BASED ON BOTH SIDES BEING PERFORMED, CANNOT BE … |
M15
Separately billed services/tests have been bundled as … |
CO | 97 | View → |
| BPR | INCLUDED IN BPR, PER DIEM OR BUNDLE. |
N644
Reimbursement has been made according to the bilateral… |
CO | 59 | View → |
| BRAC | SERVICES REQUIRE BRACHYTHERAPY SEEDS/RADIOELEMENTS TO BE BILLED |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| BRC | BRACHYTHERAPY PROCDURE FOR THE APPLICATION MUST BE BILLED |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| BTD | OTHER MSO LIABILITY. | — | CO | 109 | View → |
| C100 | $100 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C110 | $110 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C120 | $120 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C128 | $128 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C135 | $135 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C140 | $140 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C150 | $150 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C200 | $200 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C250 | $250 PATIENT COPAY AMOUNT | — | OA | 3 | View → |
| C300 | $300 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C350 | $350 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C375 | $375 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C400 | $400 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C500 | $500 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C600 | $600 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C750 | $750 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C800 | $800 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C825 | $825 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| C978 | CLAIM HAS BEEN REPROCESSED TO REFLECT UPDATED PATIENT CREDIT FILE INFORMATION. |
N381
Alert: Consult our contractual agreement for restricti… |
CO | 3 | View → |
| CAMB | Claim text note not within state transportation guidelines Eff: 1/1/17 | — | OA | 272 | View → |
| CB | PRIMARY INSURANCE PAYMENT IS BEING DEDUCTED FROM THE NET PAYMENT, IF APPLICABLE. | — | CO | 45 | View → |
| CBST | PAYMENT MADE IN ACCORDANCE WITH STATE TITLE IV-D REQUIREMENTS. | N14 | CO | 100 | View → |
| CC01 | PLEASE SUBMIT THE LETTER OF CREDIBLE COVERAGE AND OR WRITTEN DOCUMENTATION FROM THE PRIMARY INSURAN… |
MA130
Your claim contains incomplete and/or invalid informat… |
CO | 16 | View → |
| CCEN | Cook County clinics are no longer enrolled as encounter clinics as of 4/1/2020. |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 204 | View → |
| CCLM | CORRECTED CLAIM RECEIVED, NO ADDITIONAL BENEFITS ALLOWED | — | CO | 193 | View → |
| CCOP | CORRECTED CLAIM RECEIVED. CHARGES PREVIOUSLY CONSIDERED ON PRIOR CLAIM RESULTING IN AN OVERPAYMENT… |
MA67
Alert: Correction to a prior claim. |
CO | 129 | View → |
| CCR | CORRECTED CLAIM RECEIVED |
MA130
Your claim contains incomplete and/or invalid informat… |
CO | 129 | View → |
| CCS | CUSTODIAL CARE SERVICES ARE NOT COVERED UNDER THE PLAN. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | 96 | View → |
| CHEM | CHEMO ADMIN MUST BE BILLED WITH APPROPRIATE CHEMO DRUG |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| CHIP | MAXIMUM FREQUENCY REACHED FOR CHIRO SERVICES. |
N640
Exceeds number/frequency approved/allowed within time … |
OA | 119 | View → |
Remark Codes (RARC) are used on the 835 ERA and paper EOB to provide supplemental information about a claim adjustment. They always accompany a CARC (denial code) and clarify the reason for payment differences.
A Denial Code (CARC) explains why payment was adjusted. A Remark Code (RARC) provides additional context or instructions. Both appear together on remittance — look for the CARC first, then the RARC for detail.
Search by code number or keyword, or filter by adjustment group (CO, PR, OA…). Click any code to see its full RA835 mapping, common causes, step-by-step resolution guide, and appeal tips.