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 | |
|---|---|---|---|---|---|
| 3018 | EAPG-SERVICE CONSIDERED AN INPATIENT PROCEDURE. |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| 3019 | NCCI MEDICARE FAC- MUTUALLY EXCLUSIVE PROCEDURE CODE PAIR CONFLICT WITH 'XXXXX' AND IS NOT ALLOWED … |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3020 | NCCI MEDICARE FAC-PROCEDURE CODE PAIR CONFLICT WITH 'XXXXX' AND IS NOT ALLOWED EVEN IF APPROPRIATE … |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3021 | EAPG-MEDICAL VISITS REPORTED WITHOUT MODIFIER -25 OR -27 ON THE SAME DAY AS A SIGNIFICANT PROCEDURE. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3022 | EAPG-MODIFIER 'XX' IS INVALID. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3024 | EAPG-DATE OF SERVICE IS OUT OF DATE RANGE FOR GROUPER. |
N647
Adjusted based on diagnosis-related group (DRG). |
CO | 96 | View → |
| 3025 | EAPG-INVALID AGE. |
N329
Missing/incomplete/invalid patient birth date. |
CO | 16 | View → |
| 3026 | EAPG-INVALID SEX. |
MA39
Missing/incomplete/invalid gender. |
CO | 16 | View → |
| 3039 | NCCI MEDICARE FAC- MUTUALLY EXCLUSIVE PROCEDURE CODE PAIR CONFLICT WITH 'XXXXX' AND IS ALLOWED IF A… |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3040 | NCCI MEDICARE FAC-PROCEDURE CODE PAIR CONFLICT WITH 'XXXXX' AND IS ALLOWED IF AN APPROPRIATE NCCI M… |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3041 | EAPG-REVENUE CODE 'XXXX' IS INVALID. |
M50
Missing/incomplete/invalid revenue code(s). |
CO | 16 | View → |
| 3048 | EAPG-REVENUE CODE 'XXXX' REQUIRES HCPCS CODE ON SAME LINE. |
M20
Missing/incomplete/invalid HCPCS. |
CO | 16 | View → |
| 3074 | EAPG-UNITS OF SERVICE GREATER THAN ONE IS INAPPROPRIATE FOR BILATERAL PROCEDURE REPORTED WITH MODIF… |
M53
Missing/incomplete/invalid days or units of service. |
CO | 16 | View → |
| 3101 | EAPG-INVALID DIAGNOSIS CODE, 4TH OR 5TH DIGIT REQUIRED. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| 3102 | EAPG-INVALID DIAGNOSIS CODE. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| 3103 | EAPG-AGE CONFLICT-DIAGNOSIS CONSIDERED ONLY FOR NEWBORNS, AGE <1 YEAR. | — | CO | 9 | View → |
| 3104 | EAPG- AGE CONFLICT -DIAGNOSIS CONSIDERED ONLY FOR PEDIATRIC PATIENTS, AGE <18 YEARS. | — | CO | 9 | View → |
| 3105 | EAPG- AGE CONFLICT-DIAGNOSIS CONSIDERED ONLY FOR MATERNITY, FEMALES 12-55 YEARS. | — | CO | 9 | View → |
| 3106 | EAPG- AGE CONFLICT -DIAGNOSIS CONSIDERED ONLY FOR ADULTS, AGE 15 AND UP. | — | CO | 9 | View → |
| 3107 | EAPG- SEX CONFLICT-DIAGNOSIS CODE IS ONLY VALID FOR MALE PATIENTS. MAY REQUIRE CONDITION CODE 45 T… | — | CO | 10 | View → |
| 3108 | EAPG- SEX CONFLICT-DIAGNOSIS CODE IS ONLY VALID FOR FEMALE PATIENTS. MAY REQUIRE CONDITION CODE 45… | — | CO | 10 | View → |
| 3111 | EAPG- SEX CONFLICT-PROCEDURE ONLY VALID FOR MALE PATIENTS. MAY REQUIRE CONDITION CODE 45 AND MODIF… | — | CO | 7 | View → |
| 3112 | EAPG- SEX CONFLICT-PROCEDURE ONLY VALID FOR FEMALE PATIENTS. MAY REQUIRE CONDITION CODE 45 AND MOD… | — | CO | 7 | View → |
| 3115 | EAPG-FROM DATE IS INVALID OR BLANK. THIS IS A REQUIRED FIELD. |
M52
Missing/incomplete/invalid 'from' date(s) of service. |
CO | 16 | View → |
| 3116 | EAPG-THROUGH DATE IS INVALID OR BLANK. THIS IS A REQUIRED FIELD. |
M59
Missing/incomplete/invalid 'to' date(s) of service. |
CO | 16 | View → |
| 3117 | EAPG-LINE ITEM SERVICE DATE IS INVALID OR BLANK. THIS IS A REQUIRED FIELD. |
MA31
Missing/incomplete/invalid beginning and ending dates … |
CO | 16 | View → |
| 3118 | EAPG-LINE ITEM SERVICE DATE IS NOT WITHIN THE FROM-THROUGH DATES. |
MA31
Missing/incomplete/invalid beginning and ending dates … |
CO | 16 | View → |
| 3119 | EAPG-FROM DATE CANNOT BE AFTER THROUGH DATE. |
M52
Missing/incomplete/invalid 'from' date(s) of service. |
CO | 16 | View → |
| 3120 | EAPG-TERMINATED BILATERAL PROCEDURE. DO NOT USE MODIFIER -50 WHEN REPORTING A TERMINATED PROCEDURE. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3121 | EAPG-TERMINATED PROCEDURE WITH UNITS GREATER THAN ONE. DO NOT USE MULTIPLE UNITS WHEN REPORTING A T… |
M53
Missing/incomplete/invalid days or units of service. |
CO | 16 | View → |
| 3122 | EAPG-PRIMARY OR PRINCIPAL DIAGNOSIS CODE IS BLANK; MUST BE A VALID CODE. |
MA63
Missing/incomplete/invalid principal diagnosis. |
CO | 16 | View → |
| 3123 | EAPG-TYPE OF BILL IS INVALID, MAY AFFECT CLAIM PROCESSING. |
MA30
Missing/incomplete/invalid type of bill. |
CO | 16 | View → |
| 3124 | EAPG-DUPLICATE LAB OR PATHOLOGY CODE. ADD MODIFIER 59, 91, XE, XP, XS, OR XU IF DOCUMENTATION SUPPO… |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| 3128 | EAPG-DUPLICATE RADIOLOGY CODE. ADD MODIFIER IF DOCUMENTATION SUPPORTS USE TO DIFFERENTIATE SERVICES… |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| 3129 | EAPG-PRESENCE OF AN ANATOMIC SITE MODIFIER ON THIS OR CODE(S) XXXXX, XXXXX, XXXXX IS SUPPRESSING NC… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3130 | EAPG-PRESENCE OF THE SAME ANATOMIC SITE MODIFIER ON THIS AND CODE(S) XXXXX, XXXXX, XXXXX IS SUPPRES… |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 97 | View → |
| 3132 | EAPG-INHERENT BILATERAL CODE, REPORT CODE ONCE. DO NOT REPORT WITH MODIFIER -50. |
N644
Reimbursement has been made according to the bilateral… |
CO | 4 | View → |
| 3133 | EAPG-MULTIPLE E/M CODES SAME DAY WITHOUT MODIFIER -27. EVALUATE ADDING TO SECOND AND SUBSEQUENT E/M… |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3135 | EAPG-INHERENT BILATERAL PROCEDURE. CONSIDER REMOVING MODIFIER -50 FROM THIS CODE. |
N644
Reimbursement has been made according to the bilateral… |
CO | 4 | View → |
| 3143 | EAPG-DUPLICATE LAB OR PATHOLOGY CODE. ADD MODIFIER 59, 91, XE, XP, XS, OR XU IF DOCUMENTATION SUPP… |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| 3144 | EAPG-ADD-ON CODE REPORTED WITHOUT BASE PROCEDURE XXXXX, XXXXX-XXXXX. |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| 3145 | EAPG-MODIFIER -25 IS REPORTED FOR A MEDICAL VISIT EAPG WITH NO SIGNIFICANT PROCEDURE EAPG PRESENT F… |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| 3162 | EAPG-DIAGNOSIS CODE 'XXXXX' IS REPORTED. ENSURE THAT MODIFIER PA, PB, OR PC IS ALSO REPORTED. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3163 | EAPG-MODIFIER PA, PB, OR PC IS REPORTED. ENSURE THAT DIAGNOSIS CODE 'XXXXX, XXXXX, OR XXXXX' IS AL… |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| 3170 | EAPG-DUPLICATE DIAGNOSTIC OR THERAPEUTIC PROCEDURES. ADD MODIFIER IF DOCUMENTATION SUPPORTS USE TO… |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| 3171 | EAPG-MODIFIER REPORTED FOR THIS CODE IS SUPPRESSING NCCI EDIT WHEN PAIRED WITH XXXXX. REVIEW DOCUM… |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 97 | View → |
| 3172 | EAPG-REVENUE CODE REPORTED REQUIRES REASON FOR VISIT DIAGNOSIS CODE. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| 3178 | EAPG-MODIFIER 59 IS REPORTED. CONSIDER REPORTING MODIFIER XE, XP, XS, OR XU INSTEAD IF MORE APPROPR… |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| 3319 | EAPG- THIS IS MUTUALLY EXCLUSIVE CODE IS PAIRED WITH ANOTHER CODE TO TRIGGER EDIT 3019. |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3320 | EAPG- THIS COLUMN 1 CODE IS PAIRED WITH A COLUMN 2 CODE TO TRIGGER EDIT 3020. |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 96 | 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.