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RARC — Remittance Advice Remark Codes

Remark Codes — Complete List & Lookup

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.

2,992
Total Remark Codes
3
Adjustment Groups
835
RA835 Mapped
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Looking for Denial Codes (CARC)?

Browse Claim Adjustment Reason Codes — the codes that explain why a payment was reduced or denied.

Showing 1,101–1,150 of 2,992 remark codes
Remark Code Description RA835 Code Group Reason Code
X311 PROCEDURE CODE REQUIRES THAT AN NDC MUST BE BILLED ACCORDING TO NDC BILLING GUIDELINES. M49
Missing/incomplete/invalid value code(s) or amount(s).
CO 16 View →
X312 EAPG- EXTERNAL CAUSE OF MORBIDITY CODE CANNOT BE USED AS PRIMARY OR PRINCIPAL DIAGNOSIS. MA63
Missing/incomplete/invalid principal diagnosis.
CO 16 View →
X313 EAPG- INVALID PROCEDURE CODE. M51
Missing/incomplete/invalid procedure code(s).
CO 16 View →
X314 EAPG- SERVICE CONSIDERED AN INPATIENT PROCEDURE. M51
Missing/incomplete/invalid procedure code(s).
CO 16 View →
X315 EAPG - NCCI MEDICARE FAC - PROCEDURE CODE PAIR CONFLICT. COMBINATION IS NOT ALLOWED EVEN IF APPROP… M51
Missing/incomplete/invalid procedure code(s).
CO 16 View →
X316 EAPG- MEDICAL VISITS REPORTED WITHOUT MODIFIER -25 OR -27 ON THE SAME DAY AS A SIGNIFICANT PROCEDUR… N519
Invalid combination of HCPCS modifiers.
CO 16 View →
X317 EAPG- MODIFIER IS INVALID. N519
Invalid combination of HCPCS modifiers.
CO 4 View →
X318 EAPG- From date is out of date range for grouper. N301
Missing/incomplete/invalid procedure date(s).
CO 16 View →
X319 EAPG- Invalid age. N329
Missing/incomplete/invalid patient birth date.
CO 16 View →
X32 THE OTHER DIAGNOSIS CODE IS INVALID OR DISABLED. M64
Missing/incomplete/invalid other diagnosis.
CO 16 View →
X320 EAPG- Invalid sex. MA39
Missing/incomplete/invalid gender.
CO 16 View →
X321 EAPG- REVENUE CODE IS INVALID. M50
Missing/incomplete/invalid revenue code(s).
CO 16 View →
X322 EAPG- REVENUE CODE IS REQUIRES HCPCS CODE ON SAME LINE. M20
Missing/incomplete/invalid HCPCS.
CO 16 View →
X323 EAPG- UNITS OF SERVICE GREATER THAN ONE IS INAPPROPRIATE FOR BILATERAL PROCEDURE REPORTED WITH MODI… N362
The number of Days or Units of Service exceeds our acc…
CO 96 View →
X324 EAPG- Invalid diagnosis code, 4th or 5th digit required. MA65
Missing/incomplete/invalid admitting diagnosis.
CO 16 View →
X325 EAPG- Invalid diagnosis code. M64
Missing/incomplete/invalid other diagnosis.
CO 16 View →
X326 EAPG- Age conflict - diagnosis considered only for newborns, age <1 year. N657
This should be billed with the appropriate code for th…
CO 9 View →
X327 EAPG- Age conflict - diagnosis considered only for pediatric patients, age <18 years N657
This should be billed with the appropriate code for th…
CO 9 View →
X328 EAPG- Age conflict - diagnosis considered only for maternity, females 12-55 years. N657
This should be billed with the appropriate code for th…
CO 9 View →
X329 EAPG- Age conflict - diagnosis considered only for adults, age 15 and up. N657
This should be billed with the appropriate code for th…
CO 9 View →
X33 THE PRINCIPAL PROCEDURE CODE IS NOT TYPICAL FOR THIS PATIENT GENDER. MA39
Missing/incomplete/invalid gender.
CO 16 View →
X330 EAPG- Sex conflict - diagnosis code is only valid for male patients. May require condition code 45… CO 10 View →
X332 EAPG- Sex conflict - diagnosis code is only valid for female patients. May require condition code … CO 10 View →
X334 EAPG- Sex conflict - procedure only valid for male patients. May require condition code 45 and mod… CO 7 View →
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 →
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What is a Remark Code?

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.

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Remark Code vs. Denial Code

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.

How to Use This List

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.