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 | |
|---|---|---|---|---|---|
| TH75 | COMBINED THERAPY SERVICES (PT/OT/ST/CARDIAC/RESPIRATORY) LIMITED TO 75 VISITS PER YEAR. |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| TH8 | THERAPY SERVICE LIMITED TO EIGHT UNITS PER DAY |
N362
The number of Days or Units of Service exceeds our acc… |
OA | 222 | View → |
| THNA | SERVICES DENIED. THERAPY NOT AUTHORIZED. | — | CO | 197 | View → |
| TIN | PROVIDER BILLING WITH INVALID TIN. PLEASE SUBMIT CORRECTED BILLING. |
N289
Missing/incomplete/invalid rendering provider name. |
CO | 16 | View → |
| TMJX | TREATMENT FOR TMJ IS NOT COVERED UNDER THE PLAN. |
M25
The information furnished does not substantiate the ne… |
CO | 16 | View → |
| TN | TAX ID NUMBER NOT ON FILE FOR THIS PROVIDER |
N209
Missing/incomplete/invalid taxpayer identification num… |
CO | 16 | View → |
| TNA | SERVICES OVER 8 VISITS REQUIRE AUTHORIZATION. |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | 197 | View → |
| TOB | TYPE OF BILL INVALID OR MISSING WITH REV CODES BILLED |
MA30
Missing/incomplete/invalid type of bill. |
CO | 282 | View → |
| TRA | CPT/HCPC CODE INAPPROPRIATELY SUBMITTED AND MAY BE REBUNDLED TO A DIFFERENT CODE. |
M15
Separately billed services/tests have been bundled as … |
CO | 234 | View → |
| TRAN | BLOOD PRODUCT MUST BE BILLED |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| TRC | TRANSPLANT RELATED CLAIM HAS BEEN MISDIRECTED. PLEASE SUBMIT CLAIM TO OPTUM FOR CONSIDERATION. OPT… |
N418
Misrouted claim. See the payer's claim submission ins… |
CO | 109 | View → |
| TRN | PA REQUIRED FOR EMERGENT TRANSPORT OVER 50 MILES ONE-WAY |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | 197 | View → |
| TST | when 80050 is not billed on the same day as 99213 |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| TT01 | Per Phys Fee Sched, separate payment is disallowed for this code Status T code. | — | CO | 45 | View → |
| U58 | A CLAIM WAS RECEIVED FOR SERVICES THAT CANNOT BE BILLED BY THIS PROVIDER TYPE. |
N238
Incomplete/invalid physician certified plan of care. |
CO | B7 | View → |
| UBD | UNBUNDLED PROCEDURE. MORE APPROPRIATE CODE AVAILABLE. |
M15
Separately billed services/tests have been bundled as … |
CO | 234 | View → |
| UBF | FACILITY NOT ALLOWED TO BILL ON A UB CLAIM FORM |
N34
Incorrect claim form/format for this service. |
CO | 16 | View → |
| UC | PROCESSED ACCORDING TO USUAL AND CUSTOMARY. | — | CO | 59 | View → |
| UEX | PAYMENT ADJUSTED TO ALLOW NUMBER OF UNITS/VISITS APPROVED | — | CO | 45 | View → |
| UIC | UIC PROVIDER - TIN 376000511 - HANDLED BY DIFFERENT MSO. | — | CO | 109 | View → |
| UNLD | UNLISTED PROCEDURE CODE RECORDS REVIEWED, DENIAL UPHELD. | — | CO | 189 | View → |
| UNLI | PROCEDURE CODE IS AN UNLISTED CODE. PLEASE SUBMIT DOCUMENTATION FOR REVIEW OF PROCEDURE PERFORMED. … |
M20
Missing/incomplete/invalid HCPCS. |
CO | 16 | View → |
| UPSD | UNUSUAL PROCEDURE SERVICE REVIEWED AND DENIED. PLEASE SUBMIT ADDITIONAL DOCUMENTATION ON WHY THIS … |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 189 | View → |
| US2 | SERVICES ARE LIMITED TO 2 OBSTETRIC ULTRASOUNDS PER PREGNANCY. |
N362
The number of Days or Units of Service exceeds our acc… |
CO | 222 | View → |
| VAC | VACCINE AND ADMIN CODE MUST BE BILLED TOGETHER |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| VBID | COST SHARING WAIVED DUE TO CHRONIC ILLNESS SUPPORT PROGRAM. | — | CO | 59 | View → |
| VDOS | PLEASE VERIFY DATE OF SERVICE WAS BILLED CORRECTLY VERSES ALL OTHER DATES OF SERVICE BILLED. |
N65
Procedure code or procedure rate count cannot be deter… |
CO | 16 | View → |
| VHRD | VISION HARDWARE LIMITED TO $150.00 BENEFITS ALLOWED. MEMBER MAY BE RESPONSIBLE FOR CHARGES OVER THI… | — | OA | 119 | View → |
| VIRT | G2012 MUST BE BILLED SEPARATELY FROM ENCOUNTER CODE |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 272 | View → |
| VIS1 | ONE EYE EXAM PER YEAR. |
N640
Exceeds number/frequency approved/allowed within time … |
CO | 222 | View → |
| VIS2 | ONE EYE EXAM EVERY 2 YEARS |
N640
Exceeds number/frequency approved/allowed within time … |
CO | 222 | View → |
| VNC | VISION IS NOT A COVERED BENEFIT. |
N216
We do not offer coverage for this type of service or t… |
CO | 96 | View → |
| VSHD | VISION HARDWARE IS NOT SEPARATELY PAYABLE. |
N330
Missing/incomplete/invalid patient death date. |
CO | 97 | View → |
| VSP | SERVICES SHOULD BE SUBMITTED TO THE VISION VENDOR FOR CONSIDERATION. | — | CO | 109 | View → |
| WATY | CLAIM DOES NOT FOLLOW HFS ATYPICAL BILLING GUIDELINES |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 272 | View → |
| WC3Y | SERVICES EXCEEDING 3 VISITS PER YEAR REQUIRE AUTHORIZATION |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | 197 | View → |
| WCYM | PRIOR AUTH REQUIRED WHEN SERVICES EXCEEDS 3 VISITS PER YEAR. |
M62
Missing/incomplete/invalid treatment authorization cod… |
CO | 197 | View → |
| WH | WITHHOLD - 19% | — | CO | 104 | View → |
| WNC | WAIVER SERVICES NOT COVERED UNDER BENEFIT PLAN. |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 204 | View → |
| WRED | 25% WITHOLD REDUCTION APPLIES | — | CO | 45 | View → |
| WTAK | 25% WITHHOLD DEDUCTION TAKEN ON CLAIM | — | CO | 45 | View → |
| WVPD | Member Not Eligible for 1115 Waiver Program Benefit |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 96 | View → |
| X1 | ADMISSION DIAGNOSIS: THE ADMISSION DIAGNOSIS IS INVALID OR DISABLED. |
MA65
Missing/incomplete/invalid admitting diagnosis. |
CO | 16 | View → |
| X10 | ADMISSION DIAGNOSIS IS NOT TYPICAL FOR A PATIENT OF THIS AGE. |
M76
Missing/incomplete/invalid diagnosis or condition. |
CO | 9 | View → |
| X100 | E/M CONDITION NOT MET AND LINE ITEM DATE FOR OBS CODE G0244 IS NOT 12/31 OR 1/1 |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| X101 | COMPOSITE E/M CONDITION NOT MET FOR OBSERVATION AND LINE ITEM DATE FOR CODE G0378 IS 1/1 |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 272 | View → |
| X102 | G0379 ONLY ALLOWED WITH G0378 |
M15
Separately billed services/tests have been bundled as … |
CO | 234 | View → |
| X103 | CLINICAL TRIAL REQUIRES DIAGNOSIS CODE V707 AS OTHER THAN PRIMARY DIAGNOSIS |
M76
Missing/incomplete/invalid diagnosis or condition. |
CO | 16 | View → |
| X104 | USE OF MODIFIER CA WITH MORE THAN ONE PROCEDURE NOT ALLOWED |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| X105 | SERVICE CAN ONLY BE BILLED TO THE DMERC |
N255
Missing/incomplete/invalid billing provider taxonomy. |
CO | 16 | 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.