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 1,301–1,350 of 2,818 remark codes in group CO

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Remark Code	Description	RA835 Code	Group	Reason Code
X683	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 →
X684	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 →
X685	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 →
X686	SUCTION VALVE BILLED WITH A LOCKING MECHANISM IS NOT COVERED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X687	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 →
X688	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 →
X689	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 →
X69	PATIENT AGE INVALID	N329 Missing/incomplete/invalid patient birth date.	CO	6	View →
X690	ORTHOPEDIC FOOTWEAR IS NOT COVERED BY CMS.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X691	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 →
X692	THERAPEUTIC SHOES/INSERTS/MODIFICATIONS FOR DIABETICS ONLY IS NOT COVERED BY CMS WHEN BILLED WITHOU…	M64 Missing/incomplete/invalid other diagnosis.	CO	16	View →
X693	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 →
X694	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 →
X695	NON-DME CODE BILLED BY A DME PROVIDER WILL BE DENIED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X696	PROCEDURE BILLED IN INPATIENT OR FACILITY PLACES OF SERVICE WILL BE DENIED.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X697	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 →
X698	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 →
X699	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 →
X7	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 →
X70	PATIENT SEX INVALID	MA39 Missing/incomplete/invalid gender.	CO	7	View →
X700	HOSPITAL BED REQUIRES APPROPRIATE CODE WHEN BILLED WITH SIDE RAILS	N130 Consult plan benefit documents/guidelines for informat…	CO	16	View →
X701	KNEE ORTHOSIS AND ORTHOTIC ADDITIONS MUST BE BILLED WITH MODIFIER KX	N657 This should be billed with the appropriate code for th…	CO	4	View →
X702	THERAPEUTIC SHOES/INSERTS/MODIFICATIONS FOR DIABETICS ONLY ARE NOT COVERED BY CMS WHEN BILLED WITHO…	N657 This should be billed with the appropriate code for th…	CO	4	View →
X703	THERAPEUTIC SHOE/INSERT/MODIFICATION FOR DIABETICS ONLY IS NOT COVERED BY CMS WHEN BILLED WITHOUT A…	N657 This should be billed with the appropriate code for th…	CO	4	View →
X704	SURGICAL DRESING MODIFIER CAN CAN ONLY BE BILLED WITH SURGICAL DRESSING CODE	N519 Invalid combination of HCPCS modifiers.	CO	4	View →
X705	BASED ON MEDICAID GUIDELINES, A7526 (TRACHEOSTOMY TUBE COLLAR/ HOLDER) IS DENIED WHEN BILLED WITH A…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X706	INTERMITTENT URINARY CATHETER IS NOT COVERED WHEN BILLED MORE THAN 600 UNITS IN A 3 MONTH PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X707	UROLOGICAL SUPPLIES ARE NOT COVERED BY CMS WHEN BILLED WITHOUT APPROPRIATE MODIFIER (KX)	N657 This should be billed with the appropriate code for th…	CO	4	View →
X708	BLOOD PRODUCT IS A NON-COVERED SERVICE	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X709	PROSTATE SCREENING IS NOT COVERED BY CMS WHEN THE PATIENT IS UNDER 50 YEARS OF AGE.	N129 Not eligible due to the patient's age.	CO	6	View →
X71	ONLY INCIDENTAL SERVICES REPORTED	N122 Add-on code cannot be billed by itself.	CO	234	View →
X710	SCREENING MAMMOGRAPHY IS NOT COVERED BY CMS WHEN PATIENT'S AGE IS LESS THAN 35	M37 Not covered when the patient is under age 35.	CO	6	View →
X711	CPT 55873 (CRYOSURGICAL ABLATION OF THE PROSTATE) MUST BE BILLED WITH DIAGNOSIS C61 (CANCER OF PROS…	M76 Missing/incomplete/invalid diagnosis or condition.	CO	16	View →
X712	SEPARATE REIMBURSEMENT IS NOT ALLOWED FOR RADIOLOGY SERVICES WITH A MODIFIER 26 OR 76140 WHEN BILLE…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X713	CASTING/STRAPPING PROCEDURE IS NOT COVERED BY CMS WHEN BILLED IN A SKILLED NURSING FACILITY	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X714	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X715	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X716	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN 9 TIMES PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X717	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN 9 TIMES PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X718	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN TWICE PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X719	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN 31 UNITS PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X72	CODE NOT RECOGNIZED BY MEDICARE FOR OUTPATIENT CLAIMS; ALTERNATE CODE FOR SAME SERVICE MAY BE AVAIL…	M51 Missing/incomplete/invalid procedure code(s).	CO	16	View →
X720	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN 31 UNITS PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X721	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN 124 UNITS PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X722	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN FOUR TIMES PER CALENDAR YEAR	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X723	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X724	UROLOGICAL SUPPLIES IS NOT COVERED BY CMS WHEN BILLED MORE THAN FOUR TIMES PER CALENDAR YEAR	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X725	PROCEDURE IS NOT COVERED BY CMS WHEN BILLED MORE THAN ONCE PER CALENDAR MONTH	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X726	PROSTATE CANCER SCREENING IS NOT COVERED BY CMS IF BILLED MORE THAN ONCE IN AN 11 MONTH PERIOD	N640 Exceeds number/frequency approved/allowed within time …	CO	151	View →
X727	NEW TRACHEOSTOMY CARE KIT IS NOT COVERED BY CMS WHEN ACCOMPANYING OPEN SURGICAL TRACHEOSTOMY WAS NO…	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.