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 1,201–1,250 of 2,992 remark codes

Remark Code	Description	RA835 Code	Group	Reason Code
X410	Procedure code is not appropriate for the age of the patient.	N129 Not eligible due to the patient's age.	CO	6	View →
X411	Procedure code requires manual pricing.	N10 Adjustment based on the findings of a review organizat…	CO	44	View →
X412	Procedure code requires that an NDC must be billed according to NDC billing guidelines.	M119 Missing/incomplete/invalid/ deactivated/withdrawn Nati…	CO	16	View →
X413	Taxonomy cannot bill in an outpatient hospital setting.	N94 Claim/Service denied because a more specific taxonomy …	CO	16	View →
X414	The procedure code billed is an inpatient only code.	—	CO	5	View →
X415	EPSDT claim requires one of the following CPT codes to be the first procedure code billed on the cl…	N182 This claim/service must be billed according to the sch…	CO	16	View →
X416	NDC billed is not in the proper format. The NDC must be in the 5-4-2 configuration.	M119 Missing/incomplete/invalid/ deactivated/withdrawn Nati…	CO	16	View →
X417	A Multiple procedure reduction applies to procedure code.	—	CO	59	View →
X418	Procedure Code is part of a bi-latteral procedure and is paid at 150% of ASC grouping rate.	N644 Reimbursement has been made according to the bilateral…	CO	59	View →
X419	Modifier indicates supervision of more than one procedure. Line is reimbursed at 30% of the physici…	N644 Reimbursement has been made according to the bilateral…	CO	59	View →
X42	THE PROCEDURE CODE SHOULD NOT BE REPORTED WHEN THE PATIENTâS LENGTH OF STAY IS LESS THAN FOUR DAY…	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X420	Modifier indicates medical direction of service performed by CRNA. Line is reimbursed at 60% of the…	—	CO	203	View →
X421	Modifier indicates a surgical assistant. Line is reimbursed at 20% of the physician fee schedule.	—	CO	203	View →
X422	Modifier indicates a co-surgeon. Line is reimbursed at 62.5% of the physician fee schedule.	—	CO	203	View →
X423	Taxonomy reimburses at a variable percentage of physician fee schedule.	—	CO	203	View →
X424	Place of Service reimbursed at a reduced rate. Line is reimbursed at 80% of the physician fee sched…	N381 Alert: Consult our contractual agreement for restricti…	CO	144	View →
X425	Service is packaged into another billed procedure.	M15 Separately billed services/tests have been bundled as …	CO	234	View →
X426	Modifier not applicable for procedure code. Line item not reimbursed.	N519 Invalid combination of HCPCS modifiers.	CO	4	View →
X427	Bilateral procedure code with modifier 50 cannot exceed 1 unit.	N644 Reimbursement has been made according to the bilateral…	CO	59	View →
X428	Code is not separately reimbursable.	M15 Separately billed services/tests have been bundled as …	CO	97	View →
X429	First 30 minutes of waiting time is not reimbursed.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X43	ASSIGN DRG ONLY IF MISSING ON INSTITUTIONAL INPATIENT CLAIM	—	CO	16	View →
X430	Hospice rate reduction for services exceeding 60 days.	N640 Exceeds number/frequency approved/allowed within time …	CO	119	View →
X431	IHCP allows a maximum of one unit per service, per revenue code, per date of service.	N640 Exceeds number/frequency approved/allowed within time …	CO	222	View →
X432	Medically High-Risk Diagnosis qualifies for an increase of $10 per visit.	—	CO	B22	View →
X433	Modifier HM indicates the service should be reimbursed at 75% of the fee schedule.	—	CO	144	View →
X434	Modifier is not valid for the state of Indiana.	N517 Resubmit a new claim with the requested information.	CO	182	View →
X435	Nursing/Home health aid services are limited to 24 units a day.	N362 The number of Days or Units of Service exceeds our acc…	CO	222	View →
X436	Procedure code on historical claim indicates that multiple services were performed. This line shoul…	N381 Alert: Consult our contractual agreement for restricti…	CO	59	View →
X437	The first 10 miles of the trip are not payable for CAS and NAS providers.	N130 Consult plan benefit documents/guidelines for informat…	CO	96	View →
X438	Taxi is not reimbursed for mileage	—	CO	96	View →
X439	Time units limited to 6 units when modifier AD is billed.	—	CO	222	View →
X44	INSTITUTIONAL CLAIM WAS REGROUPED BASED ON POLICY. FINAL DRG WAS CHANGED .	N130 Consult plan benefit documents/guidelines for informat…	CO	97	View →
X440	Statutory Adjustment. Payment reduced to of fee payment.	N381 Alert: Consult our contractual agreement for restricti…	CO	144	View →
X441	Assistant Surgeon modifier indicates the line is reimbursed at 16% of the physician fee schedule.	—	CO	203	View →
X442	The presence of modifier 54 indicates that only the Surgical care portion of the global fee should …	—	CO	203	View →
X443	The presence of modifier 55 indicates that only Post-operative portion of the global fee should be …	—	CO	203	View →
X444	The presence of modifier 56 indicates that only Pre-operative portion of the global fee should be r…	—	CO	203	View →
X445	Physician filing for a mid-level provider. Services reimbursed at 92% of fee schedule.	—	CO	144	View →
X446	Taxonomy reimburses at a variable percentage of the physician fee schedule.	—	CO	144	View →
X447	CRNA service modifier indicates the line is reimbursed at 92% of the physician fee schedule.	—	CO	144	View →
X448	(Physician/Ancillary)Per Medicaid's Medically Unlikely Edits Policy, total units billed for procedu…	M53 Missing/incomplete/invalid days or units of service.	CO	222	View →
X449	(Outpatient)Per Medicaid's Medically Unlikely Edits Policy, total units billed for procedure exceed…	N362 The number of Days or Units of Service exceeds our acc…	CO	222	View →
X45	INVALID DIAGNOSIS CODE	M64 Missing/incomplete/invalid other diagnosis.	CO	16	View →
X450	(Physician/Ancillary)Per Medicaid's CCI Guidelines, Procedure Code has an unbundle relationship wit…	M15 Separately billed services/tests have been bundled as …	CO	234	View →
X451	(Physician/Ancillary)Per Medicaid's CCI Guidelines, History Procedure Code on Claim has an unbundle…	M15 Separately billed services/tests have been bundled as …	CO	234	View →
X452	(Outpatient)Per Medicaid's CCI Guidelines, Procedure Code has an unbundle relationship with another…	M15 Separately billed services/tests have been bundled as …	CO	234	View →
X453	(Outpatient)Per Medicaid's CCI Guidelines, History Procedure Code has an unbundle relationship with…	M15 Separately billed services/tests have been bundled as …	CO	234	View →
X454	LATE BILLS ARE NOT COVERED	N214 Missing/incomplete/invalid history of the related init…	CO	B4	View →
X455	IL MCD emergency contraceptive pills must be billed using J8499 effective with dates of service Jun…	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.