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 2,151–2,200 of 2,818 remark codes in group CO

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Remark Code	Description	RA835 Code	Group	Reason Code
Y652	DME SUPPLIERS CANNOT BILL IN PLACE OF SERVICE WHEN THE PATIENT IS 21 YEARS OR OLDER.	M77 Missing/incomplete/invalid/inappropriate place of serv…	CO	5	View →
Y653	REVENUE CODE INVALID FOR CATEGORY OF SERVICE.	M50 Missing/incomplete/invalid revenue code(s).	CO	16	View →
Y654	OCCURRENCE CODE 50 IS NO LONGER VALID TO BYPASS PA FOR POST-DISCHARGE SERVICES. OCCURRENCE CODE 42 …	M45 Missing/incomplete/invalid occurrence code(s).	CO	16	View →
Y655	PROCEDCURE CODE CAN ONLY BE USED BY OUTPATIENT FACILITIES BILLED ON AN INSTUTIONAL CLAIM (C CODES)	M51 Missing/incomplete/invalid procedure code(s).	CO	16	View →
Y656	WHEN MULTIPLE GENERAL ANESTHESIA SERVICE CODES, ONLY THE HIGHEST SUBMITTED CHARGE AMOUNT WILL BE PA…	N634 The allowance is calculated based on anesthesia time u…	CO	59	View →
Y657	INCORRECT BILLING OF ASSISTANT SURGEON MODIFIERS FOR CRITICAL ACCESS PROFESSIONAL FEES REVENUE CODE…	N130 Consult plan benefit documents/guidelines for informat…	CO	272	View →
Y658	INCORRECT BILLING OF CO-SURGEON MODIFIER FOR CRITICAL ACCESS PROFESSIONAL FEES REVENUE CODE.; REVEN…	N130 Consult plan benefit documents/guidelines for informat…	CO	272	View →
Y659	C CODES CANNOT BE BILLED WITH REVENUE CODES REPRESENTING PROFESSIONAL FEES; REVENUE CODES 0960-0989.	N130 Consult plan benefit documents/guidelines for informat…	CO	272	View →
Y660	DENY ROOM AND BOARD REVENUE CODES WHEN BILLED IN AN OUTPATIENT HOSPITAL SETTING.	N676 Service does not qualify for payment under the Outpati…	CO	60	View →
Y661	MEDICAL/SURGICAL SUPPLIES AND DME CANNOT BE BILLED WITH PROFESSIONAL FEE REVENUE CODES (0960-0989) …	N130 Consult plan benefit documents/guidelines for informat…	CO	272	View →
Y662	FACILITY SHOULD NOT BILL OP CLAIM.	N676 Service does not qualify for payment under the Outpati…	CO	60	View →
Y663	FACILITY SHOULD NOT BILL IP CLAIM.	N130 Consult plan benefit documents/guidelines for informat…	CO	272	View →
Y664	PROSTHESIS BILLED WITH MODIFIER K0 OR KO WILL BE DENIED.	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y665	DME IS NOT ON THE CAPPED RENTAL LIST AND CANNOT BE BILLED WITH A RENTAL MODIFIER	N519 Invalid combination of HCPCS modifiers.	CO	16	View →
Y666	PROSTHESIS AND ORTHOSIS MUST BE BILLED WITH MODIFIERS LT OR RT	N519 Invalid combination of HCPCS modifiers.	CO	16	View →
Y667	CAPPED DME RENTAL IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE MODIFIER(RR,KI,KH O…	N519 Invalid combination of HCPCS modifiers.	CO	16	View →
Y668	DME SERVICE IS NOT COVERED BY CMS AS A RENTAL OR A PURCHASE WHEN THE ITEM HAS PREVIOUSLY BEEN PAID …	N522 Duplicate of a claim processed, or to be processed, as…	CO	18	View →
Y669	WHEEL CHAIR OR ACCESSORY IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE MODIFIER (KX)	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y670	CUSHIONS AND POSITIONING ACCESSORIES IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE …	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y671	HOSPITAL BED OR ACCESSORY IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE MODIFIER (K…	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y672	TOTAL ELECTRIC HOSPITAL BED IS NOT COVERED BY MEDICARE	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y673	WHEEL CHAIR OR ACCESSORY IS NOT COVERED BY MEDICARE WHEN BILLED WITHOUT AN APPROPRIATE MODIFIER (KX)	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y674	OXYGEN OR OXYGEN EQUIPMENT IS NOT COVERED WHEN BILLED MORE THAN ONCE PER MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y675	OXYGEN RENTAL EQUIPMENT CPT IS NOT COVERED BY CMS WHEN BILLED WITHOUT RENTAL MODIFIER RR	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y676	LARGE VOLUME ULTRASONIC NEBULIZER/ACCESSORIES ARE NOT COVERED BY CMS	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y677	RESPIRATORY ASSIST DEVICE IS NOT COVERED WHEN BILLED WITHOUT MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y678	EXTERNAL INFUSION PUMP/ADMINISTRATION IS NOT COVERED WHEN BILLED WITHOUT MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y679	EXTERNAL INFUSION PUMPS ARE NOT COVERED WHEN BILLED WITHOUT MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y680	COMMODE MUST BE BILLED WITH MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y681	SPEECH GENERATING DEVICE MUST BE BILLED WITH MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y682	HIGH FREQUENCY CHEST WALL OSCILLATION DEVICE MUST BE BILLED WITH MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y683	AUTOMATIC EXTERNAL DEFIBRILLATOR IS NOT COVERED WHEN BILLED WITHOUT MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y684	MISCELLANEOUS DME SUPPLY/ACCESSORY IS NOT COVERED WHEN BILLED WITH WEARABLE, AUTOMATIC EXTERNAL DEF…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y685	HOME GLUCOSE MONITORING SUPPLIES MUST BE BILLED WITH AN APPROPRIATE MODIFIER.	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y686	SUCTION VALVE BILLED WITH A LOCKING MECHANISM IS NOT COVERED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y687	GASTROSTOMY/JEJUNOSTOMY TUBE IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE IN A 90 DAY PERIOD.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y688	ENTERAL FEEDING KITS IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE PER MONTH.	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y689	ANKLE-FOOT ORTHOSIS/KNEE-ANKLE-FOOT ORTHOSIS MUST BE BILLED WITH MODIFIER KX.	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y690	ORTHOPEDIC FOOTWEAR IS NOT COVERED BY CMS.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y691	ORTHOPEDIC SHOES ARE NOT COVERED BY CMS WHEN BILLED WITHOUT A KX MODIFIER	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y692	THERAPEUTIC SHOES/INSERTS/MODIFICATIONS FOR DIABETICS ONLY IS NOT COVERED BY CMS WHEN BILLED WITHOU…	M64 Missing/incomplete/invalid other diagnosis.	CO	16	View →
Y693	THERAPEUTIC INSERT FOR DIABETICS ONLY IS NOT COVERED BY CMS WHEN BILLED WITH L5000 ON THE SAME CLAI…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y694	NEGATIVE WOUND THERAPY PRESSURE PUMP MUST BE BILLED WITH MODIFIER KX.	N657 This should be billed with the appropriate code for th…	CO	4	View →
Y695	NON-DME CODE BILLED BY A DME PROVIDER WILL BE DENIED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y696	PROCEDURE BILLED IN INPATIENT OR FACILITY PLACES OF SERVICE WILL BE DENIED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
Y697	CAPPED DME RENTAL IS NOT COVERED BY MEDICARE WHEN BILLED MORE THAN ONCE PER MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y698	CAPPED DME RENTAL IS NOT COVERED BY MEDICARE WHEN BILLED MORE THAN ONCE 21 DAY PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y699	CAPPED DME RENTAL IS NOT COVERED BY MEDICARE WHEN BILLED MORE THAN 7 TIMES IN A 13 MONTH PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
Y7	PRINCIPAL DIAGNOSIS DESCRIBES AN EXTERNAL CAUSE OR REQUIRES THE ICD CODE FOR THE FIRST UNDERLYING D…	MA63 Missing/incomplete/invalid principal diagnosis.	CO	16	View →
Y700	HOSPITAL BED REQUIRES APPROPRIATE CODE WHEN BILLED WITH SIDE RAILS	N130 Consult plan benefit documents/guidelines for informat…	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.