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 | |
|---|---|---|---|---|---|
| 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 → |
| 3339 | EAPG- THIS MUTUALLY EXCLUSIVE CODE IS PAIRED WITH ANOTHER CODE TO TRIGGER EDIT 3039. |
M86
Service denied because payment already made for same/s… |
CO | 97 | View → |
| 3340 | EAPG- THIS COLUMN 1 CODE IS PAIRED WITH COLUMN 2 CODE TO TRIGGER EDIT 3040. |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 96 | View → |
| 3600 | EAPG-CORNEAL TRANSPLANT CODED. ENSURE THAT IF APPROPRIATE, ACQUISITION OF THE CORNEAL TISSUE IS ALS… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3601 | EAPG-TRANSFUSION IS CODED. ENSURE THAT BLOOD AND BLOOD PRODUCTS TRANSFUSED ARE ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3602 | EAPG-BRACHYTHERAPY IS CODED. ENSURE THAT BRACHYTHERAPY SEEDS OR RADIOELEMENT IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3603 | EAPG-NUCLEAR MEDICINE IS CODED. ENSURE THAT RADIOPHARMACEUTICALS USED IN NUCLEAR MEDICINE PROCEDURE… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3604 | EAPG-INFUSION THERAPY IS CODED. ENSURE THAT THE SUBSTANCE INFUSED IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3605 | EAPG-CHEMOTHERAPY IS CODED. ENSURE THAT CHEMOTHERAPEUTIC AGENTS AND OTHER SUPPORTIVE DRUGS ARE ALSO… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3606 | EAPG-VACCINATION IS CODED. ENSURE THAT THE VACCINE ADMINISTERED IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3607 | EAPG-INJECTION IS CODED. ENSURE THAT THE SUBSTANCE INJECTED IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3609 | EAPG-LENS IMPLANT IS CODED. ENSURE THAT THE INTRAOCULAR LENS IS ALSO CODED IF APPLICABLE. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3610 | EAPG-NEUROSTIMULATOR IMPLANTATION IS CODED. ENSURE THAT THE NEUROSTIMULATOR IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3611 | EAPG-INSERTION OF PROSTHESIS IS CODED. ENSURE THAT THE PENILE PROSTHESIS IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3613 | EAPG-RADIOLOGY PROCEDURE WITH CONTRAST IS CODED. ENSURE THAT THE CONTRAST MATERIAL IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3614 | EAPG-INTERVENTIONAL RADIOLOGY PROCEDURE IS CODED. ENSURE THAT THE SURGICAL INTERVENTION IS ALSO COD… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3615 | EAPG-A 3D RENDERING RADIOLOGY PROCEDURE IS CODED. ENSURE THAT THE BASE RADIOLOGY PROCEDURE IS ALSO … |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3617 | EAPG-SURGICAL PLACEMENT OF DEVICE FOR CLINICAL BRACHYTHERAPY HAS BEEN CODED. ENSURE THAT APPLICATI… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 3618 | EAPG-SKIN SUBSTITUTE IS CODED. ENSURE THAT APPLICATION OF THE SKIN SUBSTITUTE IS ALSO CODED. |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| 6003 | APPLIED TO THE INDIVIDUAL IN-NETWORK DEDUCTIBLE. | — | OA | 1 | View → |
| 6008 | APPLIED TO THE FAMILY IN-NETWORK DEDUCTIBLE. | — | OA | 1 | View → |
| 6011 | APPLIED TO YOUR INDIVIDUAL IN-NETWORK OUT OF POCKET. | — | OA | 2 | View → |
| 6012 | APPLIED TO YOUR IN-NETWORK FAMILY OUT OF POCKET. | — | OA | 2 | 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.