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 2,051–2,100 of 2,818 remark codes in group CO

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Remark Code	Description	RA835 Code	Group	Reason Code
Y553	(CERCLAGE REMOVAL) WILL BE DENIED AS INCLUDED IN THE DELIVERY FEE, WHEN THE REMOVAL OF A CERCLAGE I…	N55 Procedures for billing with group/referring/performing…	CO	16	View →
Y554	PROCEDURE CODE REQUIRES ICD-10 Z00.6 ALSO BE BILLED ON THE CLAIM.	M76 Missing/incomplete/invalid diagnosis or condition.	CO	16	View →
Y555	DME CODE BILLED WITH MODIFIER WILL BE DENIED BECAUSE SAME EQUIPMENT HAS BEEN PURCHASED WITHIN PAST …	N417 This service is allowed 1 time in a 5-year period.	CO	119	View →
Y556	(STERILE SALINE) BILLED WITH ORORPHARYNGEAL SUCTION CATHETER WHEN A TRACHEAL SUCTION CATHETER HAS N…	N381 Alert: Consult our contractual agreement for restricti…	CO	16	View →
Y557	(MASTECTOMY BRA) WILL BE DENIED IF BREAST PROSTHESIS HAS NOT BEEN BILLED WITHIN THE PREVIOUS TWO (2…	N381 Alert: Consult our contractual agreement for restricti…	CO	16	View →
Y558	() IS DENIED BECAUSE THE SAME PROCEDURE HAS BEEN RENDERED TO THE MEMBER ON WITHIN THE PREVIOUS FIVE…	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y559	(DME REPAIR) IS DENIED BECAUSE THE MEMBER HAS DURABLE MEDICAL EQUIPMENT PURCHASE ON THE SAME SERVIC…	M86 Service denied because payment already made for same/s…	CO	16	View →
Y560	(DME REPAIR) IS DENIED BECAUSE IT WAS BILLED WITH A FREQUENTLY SERVICED RENTAL ITEM APPENDED WITH M…	MA114 Missing/incomplete/invalid information on where the se…	CO	16	View →
Y561	(POWER WHEELCHAIR ACCESSORY) IS DENIED BECAUSE POWER WHEELCHAIR WAS NOT FOUND IN CLAIM HISTORY WITH…	MA114 Missing/incomplete/invalid information on where the se…	CO	151	View →
Y562	STATIONARY OXYGEN SYSTEM IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE WITHIN THE SAME MONTH.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y563	PORTABLE OXYGEN SYSTEM IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE WITHIN THE SAME MONTH.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y564	OXYGEN ACCESSORY IS NOT COVERED BY CMS WHEN BILLED WITH OXYGEN RENTAL SYSTEM ON THE SAME MONTH.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y565	STATIONARY OXYGEN CONTENTS IS NOT COVERED BY CMS WHEN BILLED WITH STATIONARY OXYGEN RENTAL SYSTEM O…	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y566	NEBULIZER IS NOT COVERED IF BILLED MORE THAN ONCE EVERY MONTHS	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y567	RESPIRATORY ASSIST DEVICE IS NOT COVERED IF BILLED MORE THAN ONCE EVERY MONTHS	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y568	TENS DEVICE IS NOT COVERED BY CMS AS A PURCHASE IF IT HAS NOT BEEN BILLED WITH A RENTAL MODIFIER (R…	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y569	TENS SUPPLIES ARE NOT COVERED BY CMS BECASE A TENS DEVICE WAS BILLED ON ANOTHER CLAIM.	N522 Duplicate of a claim processed, or to be processed, as…	CO	18	View →
Y570	TENS SUPPLIES ARE NOT COVERED BY CMS BECAUSE "A4595" WAS BILLED ON ANOTHER CLAIM.	N381 Alert: Consult our contractual agreement for restricti…	CO	16	View →
Y571	REPLACEMENT LEAD WIRES ARE NOT COVERED BY CMS BECAUSE A TENS DEVICE WAS BILLED ON ANOTHER CLAIM.	N381 Alert: Consult our contractual agreement for restricti…	CO	272	View →
Y572	PRESSURE REDUCING SUPPORT SURFACE IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE WITHIN THE SAME …	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y573	ORTHOSES ADDITION CODES ARE NOT ELIGIBLE FOR SEPARATE PAYMENT.	N15 Services for a newborn must be billed separately.	CO	97	View →
Y574	ORTHOSES ADDITION CODES ARE INCLUDED IN PRIMARY PROCEDURE.	M75 Multiple automated multichannel tests performed on the…	CO	236	View →
Y575	E/M PROCEDURE WAS BILLED ON THE SAME DATE OF SERVICE WITH CARDIOVASCUALR SERVICE WITHOUT AN APPROPR…	N572 This procedure is not payable unless appropriate non-p…	CO	16	View →
Y576	E/M PROCEDURE WAS BILLED ON THE SAME DATE OF SERVICE WITH CARDIOVASCUALR SERVICE ON HISTORY CLAIM ,…	N13 Payment based on professional/technical component modi…	CO	16	View →
Y577	VERTEBRAL AXIAL DECOMPRESSION, PER SESSION, IS A NON-COVERED SERVICE.	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y578	HAIR ANALYSIS IS A NON-COVERED SERVICE.	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y579	BACTERIAL URINE CULTURE IS NOT COVERED BY MEDICARE	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y580	HUMAN IMUNODEFICIENCY VIRUS (HIV) TESTING IS NOT COVERED BY MEDICARE	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y581	HUMAN IMMUNODEFICIENCY VIRUS (HIV) TESTING (PROGNOSIS INCLUDING MONITORING) IS NOT COVERED BY MEDIC…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y582	BLOOD COUNTS TESTING IS NOT COVERED BY MEDICARE WHEN BILLED WITH UNSUPPORTED DIAGNOSIS	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y583	PARTIAL THROMBOPLASTIN TIME (PTT) IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT SUPPORTING DIAGNOS…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y584	PROTHROMBIN TIME (PT) IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT SUPPORTING DIAGNOSIS	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y585	PROCEDURE HAS A MAXIMUM FREQUENCY OF SERVICES	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y586	PROTHROMBIN TIME (PT) HAS A MAXIMUM FREQUENCY OF SERVICE UNITS PER FREQUENCY VALUE QUALIFIER	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y587	SERUM IRON STUDIES ARE NOT COVERED BY MEDICARE WITHOUT AN APPROPRIATE DIAGNOSIS	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y588	SERUM IRON STUDIES ARE NOT COVERED BY MEDICARE WHEN BILLED MORE THAN ONCE IN A 90 DAY INTERVAL.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y589	COLLAGEN CROSSLINKS ARE NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING DIAGN…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y590	GLYCATED HEMOGLOBIN/GLYCATED PROTEIN ARE NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y591	THYROID TESTING IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING DIAGNOSIS	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y592	DIGOXIN THERAPEUTIC DRUG ASSAY IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPOR…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y593	ALPHA-FETOPROTEIN IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING DIAGNOSIS	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y594	CARCINOEMBRYONIC ANTIGEN IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING D…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y595	TUMOR ANTIGEN BY IMMUNOASSAY CA 125 IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE S…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y596	TUMOR ANTIGEN BY IMMUNOASSAY CA 19-9 IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE …	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y597	PROSTATE SPECIFIC ANTIGEN IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING …	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y598	PROSTATE SPECIFIC ANTIGEN IS NOT COVERED BY MEDICARE WHEN BILLED MORE THAN ONCE IN A 12 MONTH PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y599	GAMMA GLUTAMYL TRANSFERASE IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE SUPPORTING…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y6	ADMISSION DIAGNOSIS DESCRIBES AN EXTERNAL CAUSE OR REQUIRES THE ICD CODE FOR THE FIRST UNDERLYING D…	MA63 Missing/incomplete/invalid principal diagnosis.	CO	16	View →
Y600	HEPATITIS PANEL/ACUTE HEPATITIS PANEL IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE…	N130 Consult plan benefit documents/guidelines for informat…	CO	204	View →
Y601	ALUMINUM LAB TEST IS NOT COVERED BY MEDICARE WHEN BILLED MORE THAN ONCE WITHIN A 3 MONTH PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	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.