Official X12 description
“Missing/incomplete/invalid Social Security Number or Health Insurance Claim Number (HICN).”
Source: X12 Remittance Advice Remark Codes. X12 publishes and maintains the RARC set; always verify against the current release before building a claim workflow.
Paired CARC codes
RARC N750 almost never appears alone — it accompanies one of the CARCs below on the same 835 remittance line. Fix the CARC and the RARC typically clears; the RARC alone is informational.
CARCs CAQH CORE pairs with RARC N750
Under the CAQH CORE Payment and Remittance Uniform Use rule, a health plan that reports remark code N750 on an 835 should pair it with one of the 1 claim adjustment reason code below, with the listed group code, for the business scenario 1 (Additional information required: missing, invalid or incomplete documentation). A remark paired outside this list is itself a compliance question to raise with the payer.
| CARC | Group code | Scenario |
|---|---|---|
| 251 | CO or PI | 1: Additional information required: missing, invalid or incomplete documentation |
What RARC N750 actually means
RARC N750 flags member ID issues. Correct HIC/MBI and resubmit.
Common root causes
- Member ID (HICN/MBI) missing or invalid.
Prevention checklist
- Member-ID validation at registration.
Resolution & appeal strategy — step by step
Because RARC N750 is supplemental to a CARC, the resolution path usually starts by fixing the underlying adjustment reason. A formal appeal of the RARC alone is rarely necessary.
- 1Correct member ID and resubmit.
Sample reconsideration language referencing RARC N750
Edit the bracketed fields before sending. Payer-specific reconsideration forms are often required — check the provider portal first.
How common is RARC N750?
Platform frequency ranks publish once the anonymized denial-rate pipeline reaches the publication threshold (strategy §12 Phase 2).
How QuickRCM handles RARC N750
QuickRCM reads RARC N750 alongside its paired CARC in the 835 LQ segment and routes the line to the correct worker queue with the right documentation already attached:
- Denial routing rules tuned to the CARC+RARC pair — the paired combination tells QuickRCM which documentation the payer will accept.
- Reconsideration template for this exact remark code pulls the supporting facts from the claim automatically.
- Pre-submission scrubs that catch the preventable drivers surfaced on this page before the 837 leaves the clearinghouse.
Frequently asked questions — RARC N750
What does RARC N750 mean?
RARC N750 is an X12 Remittance Advice Remark Code. The official X12 definition is: "Missing/incomplete/invalid Social Security Number or Health Insurance Claim Number (HICN)." It is supplemental to a Claim Adjustment Reason Code (CARC) on the same 835 line.
Which CARC is paired with RARC N750?
RARC N750 is most commonly paired with CARC 31, CARC 140. The CARC is the financial adjustment reason; the RARC is the informational remark. Fix the paired CARC first — the RARC usually clears with the corrected claim.
How do I resolve a RARC N750 remark on a remit?
Start from the root cause: Member ID (HICN/MBI) missing or invalid. First step: Correct member ID and resubmit. Because RARCs are supplemental, the resolution is almost always to address the paired CARC rather than appeal the RARC alone.
Where does RARC N750 appear on the 835 ERA?
RARC N750 is carried on the 835 Loop 2110 LQ segment alongside the CARC in the CAS segment of the same service line. The code and its X12 description also print on the paper EOB in the "Remark Code" or "Remark" column next to the corresponding denial or adjustment reason.
Is RARC N750 the same as ICD-10 code N750?
No. RARC N750 is a remittance-advice remark code published by X12 and carried on the 835. Any ICD-10 code with the same letters and digits is a diagnosis code on the 837 HI segment — a completely different code set maintained by the WHO/CMS. Use the transaction context (835 = RARC; 837 = ICD-10) to disambiguate.
Disclaimer
This page is operational reference for medical-billing professionals. It is not legal, clinical, or contractual advice. X12 code descriptors are maintained by the X12 External Code Lists; always verify against the current X12 release and the payer's own published policy before submitting or appealing a claim.