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

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.

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Showing 1,501–1,550 of 2,818 remark codes in group CO

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Remark Code	Description	RA835 Code	Group	Reason Code
X865	AN NDC CODE WITHOUT A CPT CODE IS NOT PERMITTED.	N657 This should be billed with the appropriate code for th…	CO	16	View →
X866	DROP NCCI (VCE.49950/VCE.49951) FOR PROCEDURE CODES 59425 OR 59426 WITH APPROPRIATE MODIFIER.	N657 This should be billed with the appropriate code for th…	CO	4	View →
X867	PHYSICAL STATUS MODIFIER MUST BE THE FIRST MODIFIER ON THE CLAIM.	N657 This should be billed with the appropriate code for th…	CO	4	View →
X868	REVENUE CODE IS INVALID FOR LTC PROVIDER.	M50 Missing/incomplete/invalid revenue code(s).	CO	16	View →
X869	BEHAVIORAL HEALTH PROVIDER REQUIRES APPROPRIATE MODIFIER ON THE ENCOUNTER CODE.	N657 This should be billed with the appropriate code for th…	CO	4	View →
X87	TRANSFUSION OR BLOOD PRODUCT EXCHANGE WITHOUT SPECIFICATION OF BLOOD PRODUCT	M84 Medical code sets used must be the codes in effect at …	CO	16	View →
X870	ENCOUNTER RATE CLINICS REQUIRE A DETAIL CODE.	N657 This should be billed with the appropriate code for th…	CO	16	View →
X871	ENCOUNTER RATE CLINICS SHOULD BE BILLED AS A SINGLE DATE OF SERVICE.	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X872	REIMBURSEMENT FOR THIS SERVICE IS INCLUDED IN THE FQHC VISIT (G CODE).	N130 Consult plan benefit documents/guidelines for informat…	CO	97	View →
X873	DASA MUST BE BILLED ON TYPE OF BILL 86X OR 89X	MA30 Missing/incomplete/invalid type of bill.	CO	282	View →
X874	INFERTILITY DIAGNOSES ARE NON COVERED FOR ILLINOIS MEDICAID	M64 Missing/incomplete/invalid other diagnosis.	CO	96	View →
X875	MATERNITY/ANTEPARTUM CODE IS CONSIDERED GLOBAL BY HFS	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X876	OCCURRENCE CODE 51 IS NO LONGER VALID. OCCURRENCE CODE 42 IS NOW REQUIRED.	M45 Missing/incomplete/invalid occurrence code(s).	CO	16	View →
X877	NON-COVERED SERVICE.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X878	THERAPY MODIFIER REDUCES TO PERCENTAGE OF THE ALLOWED AMOUNT.	N657 This should be billed with the appropriate code for th…	CO	4	View →
X879	PROFESSIONAL CLAIM IS A POSSIBLE DUPLICATE OF CLAIM IN HISTORY.	—	CO	18	View →
X88	OBSERVATION REVENUE CODE ON LINE ITEM WITH NON-OBSERVATION HCPCS CODE	M50 Missing/incomplete/invalid revenue code(s).	CO	16	View →
X880	PROFESSIONAL CLAIM LINE IS A POSSIBLE DUPLICATE OF CLAIM LINE ID.	—	CO	18	View →
X881	OUTPATIENT CLAIM IS A POSSIBLE DUPLICATE OF CLAIM IN HISTORY.	—	CO	18	View →
X882	OUTPATIENT CLAIM LINE IS A POSSIBLE DUPLICATE OF CLAIM LINE IN HISTORY. (SAME CLAIM)	—	CO	18	View →
X883	OUTPATIENT CLAIM LINE IS A POSSIBLE DUPLICATE OF CLAIM LINE. (HISTORICAL CLAIM)	—	CO	18	View →
X884	INPATIENT CLAIM IS A POSSIBLE DUPLICATE OF CLAIM IN HISTORY.	—	CO	18	View →
X885	THIS OP REVENUE CODE IS NOT ON THE LIST OF PAYABLE CODES SPECIFIED BY THE KENTUCKY MEDICAID BILLING…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X886	DIAGNOSIS IS CONSIDERED AN ADDITIONAL CODE AND SHOULD NOT BE SUBMITTED AS PRIMARY.	MA63 Missing/incomplete/invalid principal diagnosis.	CO	16	View →
X887	DISCREPANCY IN COVERED DAYS (VALUE CODE 80) AND UNITS BILLED ON ROOM AND BOARD REVENUE CODES (0100-…	M49 Missing/incomplete/invalid value code(s) or amount(s).	CO	16	View →
X888	CHALLENGE INGESTION FOOD TESTING WILL BE DENIED IF BILLED WITH INAPPROPRIATE DIAGNOSIS CODE.	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X889	HYDROPHILIC CONTACT LENSES BILLED WITH ONLY NONDISEASED EYES WITH SPHERICAL AMETROPIA, REFRACTIVE A…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X89	INPATIENT SEPARATE PROCEDURES NOT PAID	M2 Not paid separately when the patient is an inpatient.	CO	96	View →
X890	DENY 90935-90940 (HEMODIALYSIS) WHEN BILLED AND THE ONLY DIAGNOSIS ON THE CLAIM IS SCHIZOPHRENIA.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X891	DIABETES SCREENING TESTS BILLED WITH DIAGNOSIS Z131 ARE LIMITED TO ONE PER YEAR OR ONE EVERY SIX MO…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X892	APPLYING PURCHASE PRICE BASED ON 10 MONTH RENTAL POLICY.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X893	ADVANCED KNEE, ANKLE AND FOOT PROSTHETICS ARE DENIED UNLESS BILLED WITH K0-K4 FUNCTIONAL MODIFIERS.	N657 This should be billed with the appropriate code for th…	CO	4	View →
X894	NEW PATIENT VISITS ARE DENIED WHEN ANY SERVICE HAS PREVIOUSLY BEEN BILLED BY SAME FACILITY WITHIN T…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X895	E&M SERVICES ARE DENIED WHEN BILLED ON SAME DOS AS THERAPEUTIC APHERESIS SERVICES .	N20 Service not payable with other service rendered on the…	CO	96	View →
X896	A MAXIMUM OF 40 OCCURRENCES OF CPT 86003 (ALLERGEN SPECIFIC IGE; QUANTITATIVE OR SEMIQUANTITATIVE, …	N435 Exceeds number/frequency approved /allowed within time…	CO	119	View →
X897	ANTEPARTUM CARE BY SAME PROVIDER GROUP	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X898	SPECIAL SERVICES BY EMERGENCY MEDICINE PROVIDER	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X899	EXTERNAL COUNTERPULSATION (ECP) FOR SEVERE ANGINA - 1	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X9	THE OTHER DIAGNOSIS IS A DUPLICATE OF THE SECONDARY DIAGNOSIS	M64 Missing/incomplete/invalid other diagnosis.	CO	16	View →
X90	PARTIAL HOSPITALIZATION CONDITION CODE 41 NOT APPROVED FOR TYPE OF BILL	M77 Missing/incomplete/invalid/inappropriate place of serv…	CO	5	View →
X900	ANNUAL DEPRESSION SCREENING (G0444)	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X901	EXTERNAL COUNTERPULSATION (ECP) FOR SEVERE ANGINA - 2	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X902	IV HOME INFUSION WILL BE DENIED WHEN BILLED WITH MODIFIER SH OR SJ BUT THE CODE HAS NOT BEEN PREVIO…	N657 This should be billed with the appropriate code for th…	CO	4	View →
X903	DME MODIFIER IS SUBJECT TO PERCTANGE OF THE ALLOWED PURCHASE.	N130 Consult plan benefit documents/guidelines for informat…	CO	4	View →
X904	REIMBURSEMENT FOR AN ASSISTANT SURGEON WHEN BILLED BY THE PRIMARY SURGEON WILL BE DENIED.	N450 Covered only when performed by the primary treating ph…	CO	54	View →
X905	STATUS INDICATOR N - ITEMS AND SERVICES PACKAGED INTO APC RATES	N130 Consult plan benefit documents/guidelines for informat…	CO	44	View →
X906	PROCEDURE IS UNRELATED TO THE PRINCIPAL DIAGNOSIS (APR-DRG)	MA63 Missing/incomplete/invalid principal diagnosis.	CO	16	View →
X907	IF A PROVIDER SPECIALTY OTHER THAN 69 (CLINICAL LABORATORY-BILLING INDEPENDENTLY) BILLS A CLAIM WIT…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X908	NDC BILLED IS NOT IN THE PROPER FORMAT. THE NDC MUST BE 11 DIGITS. (LINE LEVEL DENIAL)	M119 Missing/incomplete/invalid/ deactivated/withdrawn Nati…	CO	16	View →
X909	NDC BILLED IS NOT IN THE PROPER FORMAT. THE NDC MUST BE 11 DIGITS. (CLAIM LEVEL DENIAL)	M119 Missing/incomplete/invalid/ deactivated/withdrawn Nati…	CO	16	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.

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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.