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 | |
|---|---|---|---|---|---|
| CHIR | MAXIMUM FREQUENCY REACHED FOR CHIRO SERVICES. PREAUTH REQUIRED |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | 197 | View → |
| CHLD | CLAIM HAS BEEN PUT ON ADMINISTRATIVE HOLD. CLAIM WILL BE CONSIDERED ONCE THE HOLD HAS BEEN REMOVED. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | 96 | View → |
| CHNA | SERVICES DENIED. CHIROPRACTIC NOT AUTHORIZED. |
N174
This is not a covered service/procedure/ equipment/bed… |
CO | 96 | View → |
| CLIN | RENDERING PROVIDER MUST PROVIDE CLINICAL INFORMATION FOR THESE SERVICES. |
M25
The information furnished does not substantiate the ne… |
CO | 16 | View → |
| CNC | CPT CODES BILLED ARE NOT COMPATIBLE WITH THE REVENUE CODES. PLEASE SUBMIT A CORRECTED BILL. |
M25
The information furnished does not substantiate the ne… |
CO | 16 | View → |
| CNIF | CLAIM DENIED PER OUTSTANDING REQUEST FOR FURTHER INFORMATION. PLEASE CONTACT OUR PROVIDER RELATION… |
M25
The information furnished does not substantiate the ne… |
CO | 26 | View → |
| CNP | CODE NOT ALLOWABLE PER PROVIDER CONTRACTED FEE SCHEDULE |
N448
This drug/service/supply is not included in the fee sc… |
CO | 96 | View → |
| COBF | A COMPLETED COORDINATION OF BENEFITS FORM MUST BE SUBMITTED BY MEMBER TO PROCESS THIS CLAIM. |
N479
Missing Explanation of Benefits (Coordination of Benef… |
OA | 252 | View → |
| COR | BENEFITS WERE COORDINATED WITH THE PRIMARY HEALTH CARE PLAN. | — | CO | 22 | View → |
| COSE | COSMETIC SERVICES/SURGERY ARE NOT COVERED UNDER THE PLAN. |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 204 | View → |
| CP10 | $10 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP15 | $15 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP18 | $18 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP20 | $20 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP23 | $23 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP24 | $24 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP25 | $25 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP26 | $26 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP30 | $30 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP33 | $33.60 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP35 | $35 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP37 | $37 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP38 | $38 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP4 | $4 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP40 | $40 PATIENT COPAY AMOUNT | — | OA | 3 | View → |
| CP45 | $45 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP5 | $5 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP50 | $50 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP55 | $55 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP60 | $60 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP69 | $69 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP70 | $70 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP75 | $75 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP8 | $8 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP80 | $80 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP85 | $85 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CP9 | $9 PATIENT COPAY AMOUNT. | — | OA | 3 | View → |
| CPPD | CLAIM PROCESSED UNDER PLAN DIRECTED CARE |
N381
Alert: Consult our contractual agreement for restricti… |
CO | 45 | View → |
| CPRH | THIS CODE IS PENDING UNTIL RATES ARE PUBLISHED FROM HFS. CLAIMS WILL BE REPROCESSED WHEN THE RATE I… |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 96 | View → |
| CPTR | CPT CODE ONLY PAYABLE WHEN BILLED WITH REV CODE 0657 |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| CR | CODE IS A COMPOUND PROCEDURE, PAYMENT INCLUDED WITH COMPREHENSIVE PROCEDURE CODE. |
M15
Separately billed services/tests have been bundled as … |
CO | 234 | View → |
| CR36 | CARDIAC REHAB SERVICES ARE LIMITED TO 36 VISITS. |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| CRC | CLAIM HAS BEEN ADJUSTED DUE TO PREVIOUS PAYMENT MADE ON CLAIM(S) PRIOR TO THIS CORRECTED CLAIM HAVI… |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 96 | View → |
| CSA | CORNEAL PROCEDURES NOT COVERED UNLESS BILLED WITH PROCEDURE INDICATING ACQUISITION OF THE CORNEAL T… |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| CSCB | NO OTHER INSURANCE COVERAGE FOR DATE OF SERVICE. CLAIMS HAVE BEEN REPROCESSED. |
N245
Incomplete/invalid plan information for other insuranc… |
CO | 129 | View → |
| CSEX | SERVICES ARE LIMITED TO FOUR PER YEAR. |
N640
Exceeds number/frequency approved/allowed within time … |
CO | 119 | View → |
| D02 | DME SERVICE EXCEEDS QUANTITY LIMITS. SVC LIMITED TO 2 EVERY YEAR. |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| D10 | DME SERVICE EXCEEDS QUANTITY LIMITS. SVC LIMITED TO 10 EVERY 60 DAYS. |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| D100 | DIAGNOSIS CODE BILLED IS NOT VALID |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| D115 | DME SERVICE EXCEEDS QUANTITY LIMITATIONS. SERVICE LIMITED TO ONE EVERY 15 MONTHS. |
N362
The number of Days or Units of Service exceeds our acc… |
OA | 222 | 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.