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 | |
|---|---|---|---|---|---|
| X336 | EAPG- Sex conflict - procedure only valid for female patients. May require condition code 45 and m… | — | CO | 7 | View → |
| X338 | EAPG- From date is invalid or blank. This is a required field. |
M52
Missing/incomplete/invalid 'from' date(s) of service. |
CO | 16 | View → |
| X339 | EAPG- Through date is invalid or blank. This is a required field. |
M59
Missing/incomplete/invalid 'to' date(s) of service. |
CO | 16 | View → |
| X34 | THE OTHER PROCEDURE CODE IS NOT TYPICAL FOR THIS PATIENT GENDER. |
M67
Missing/incomplete/invalid other procedure code(s). |
CO | 16 | View → |
| X340 | EAPG- Line item service date is invalid or blank. This is a required field. |
N301
Missing/incomplete/invalid procedure date(s). |
CO | 16 | View → |
| X341 | EAPG- Line item service date is not within the from-through dates. |
MA31
Missing/incomplete/invalid beginning and ending dates … |
CO | 16 | View → |
| X342 | EAPG- From date cannot be after through date. |
M52
Missing/incomplete/invalid 'from' date(s) of service. |
CO | 16 | View → |
| X343 | EAPG- Terminated bilateral procedure. Do not use modifier -50 when reporting a terminated procedure. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| X344 | EAPG- Terminated bilateral procedure. Do not use modifier -50 when reporting a terminated procedure. |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| X345 | EAPG- Primary or principal diagnosis code is blank; must be a valid code. |
MA63
Missing/incomplete/invalid principal diagnosis. |
CO | 16 | View → |
| X346 | EAPG- Type of bill is invalid, may affect claim processing. |
MA30
Missing/incomplete/invalid type of bill. |
CO | 16 | View → |
| X347 | 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 | 18 | View → |
| X349 | EAPG- Duplicate radiology code. Add modifier if documentation supports use to differentiate service… |
M86
Service denied because payment already made for same/s… |
CO | 18 | View → |
| X35 | PROCEDURE CODE IS NON-COVERED. THE BENEFICIARY IS OVER AGE 60. |
N129
Not eligible due to the patient's age. |
CO | 96 | View → |
| X350 | EAPG- PRESENCE OF AN ANATOMIC SITE MODIFIER/OR CODE(s) IS SUPPRESSION NCCI EDIT. CHECK DOCUMENTATIO… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X351 | EAPG- Presence of the same anatomic site modifier and code(s) is suppressing NCCI edit. Check docum… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X352 | 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 → |
| X353 | EAPG- Multiple E/M codes same day without modifier -27. Evaluate adding to second and subsequent E/… |
N657
This should be billed with the appropriate code for th… |
CO | 4 | View → |
| X354 | EAPG- Inherent bilateral procedure. Consider removing modifier -50 from this code. |
N644
Reimbursement has been made according to the bilateral… |
CO | 4 | View → |
| X355 | EAPG- Duplicate lab or pathology code. Add modifier 59, 91, XE, XP, XS, or XU if documentation sup… |
M86
Service denied because payment already made for same/s… |
CO | 18 | View → |
| X357 | EAPG- ADD ON CODE REPORTED WITHOUT BASE PROCEDURE. |
M20
Missing/incomplete/invalid HCPCS. |
CO | 16 | View → |
| X358 | EAPG- Modifier -25 is reported for a Medical Visit EAPG with no Significant Procedure EAPG present … |
M51
Missing/incomplete/invalid procedure code(s). |
CO | 16 | View → |
| X359 | EAPG- DIAGNOSIS CODE IS REPORTED. ENSURE THAT MODIFIER PA, PB, OR PC IS ALSO REPORTED. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| X36 | PROCEDURE CODE IS NON-COVERED. THE DESIGNATED DIAGNOSIS IS PRESENT. |
N569
Not covered when performed for the reported diagnosis. |
CO | 96 | View → |
| X360 | EAPG- MODIFIER PA, PB, OR PC IS REPORTED. ENSURE THAT DIAGNOSIS CODE IS ALSO REPORTED. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| X361 | EAPG- Duplicate diagnostic or therapeutic procedures. Add modifier if documentation supports use t… |
M86
Service denied because payment already made for same/s… |
CO | 96 | View → |
| X362 | EAPG- MODIFIER REPORTED FOR THIS CODE IS SUPPRESSING NCCI EDIT. REVIEW DOCUMENTATION TO DETERMINE I… |
N130
Consult plan benefit documents/guidelines for informat… |
CO | 97 | View → |
| X363 | EAPG- Revenue code reported requires Reason for Visit diagnosis code. |
M64
Missing/incomplete/invalid other diagnosis. |
CO | 16 | View → |
| X364 | EAPG- Modifier 59 is reported. Consider reporting modifier XE, XP, XS, or XU instead if more approp… |
N519
Invalid combination of HCPCS modifiers. |
CO | 16 | View → |
| X365 | EAPG- Units of service for ancillary observation hours must be reported in the range of 8 to 24 hou… |
M53
Missing/incomplete/invalid days or units of service. |
CO | 16 | View → |
| X367 | EAPG- This mutually exclusive code is paired with another code to trigger edit 3019. |
M80
Not covered when performed during the same session/dat… |
CO | 97 | View → |
| X368 | EAPG- This mutually exclusive code is paired with another code to trigger edit 3020. |
M80
Not covered when performed during the same session/dat… |
CO | 231 | View → |
| X369 | EAPG- This mutually exclusive code is paired with another code to trigger edit 3039. | — | CO | 231 | View → |
| X37 | PROCEDURE CODE IS NON-COVERED. THE NO EXEMPTION CODE IS PRESENT ON CLAIM |
N643
The services billed are considered Not Covered or Non-… |
CO | 96 | View → |
| X370 | EAPG- This Column 1 code is paired with a Column 2 code to trigger edit 3040. | — | CO | 231 | View → |
| X371 | EAPG- Corneal transplant coded. Ensure that if appropriate, acquisition of the corneal tissue is al… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X372 | 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 → |
| X373 | 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 → |
| X374 | EAPG- Nuclear medicine is coded. Ensure that radiopharmaceuticals used in nuclear medicine procedur… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X375 | 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 → |
| X376 | EAPG- Chemotherapy is coded. Ensure that chemotherapeutic agents and other supportive drugs are als… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X377 | 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 → |
| X378 | 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 → |
| X379 | 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 → |
| X38 | PROCEDURE CODE IS NON-COVERED. |
N643
The services billed are considered Not Covered or Non-… |
CO | 96 | View → |
| X380 | 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 → |
| X381 | 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 → |
| X382 | 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 → |
| X383 | EAPG- Interventional radiology procedure is coded. Ensure that the surgical intervention is also co… |
M84
Medical code sets used must be the codes in effect at … |
CO | 16 | View → |
| X384 | 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 → |
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.