RARC N30: patient ineligible for this service.

What X12 says RARC N30 means

Patient ineligible for this service.

RARC N30 · Start 01/01/2000, last modified 06/30/2003.

In plain terms: The patient is not eligible for this service.

What it means on a remittance

N30 adds detail to a CARC. "Ineligible for this service" can point at coverage that was not active, a benefit the plan does not extend to the patient, or an eligibility limit for that service. The payer chooses which CARC prints beside it; X12 publishes no pairing table.

Typical causes

• Coverage had ended or had not started on the date of service.
• The patient is not covered for this particular service under the plan.
• The claim reports the wrong patient, ID or plan.

These are common billing patterns, not a diagnosis of your claim. The remittance and the payer's policy decide.

What to check

1. Run eligibility for the date of service.
2. Confirm the patient information and ID on the claim.
3. Read the CARC beside N30. CARC 32 and 33 are eligibility reasons about dependents.
4. Check the plan's benefit rules for the service.

Correct, resubmit or appeal

Correct any claim data, bill the right payer if coverage is elsewhere, or ask the payer to explain the eligibility basis. If the patient has no coverage for the service, your policies and contract decide what follows.

Medicare dates that apply

A Medicare redetermination request must be filed within 120 calendar days from the date a party receives the notice of the initial determination; receipt is presumed 5 calendar days after the notice date unless there is evidence to the contrary (42 CFR 405.942(a)), and a late request can be considered for good cause (405.942(b)). Other payers set their own appeal windows in the contract or plan documents, so read the notice for the date. The tool above runs the date math.

Related codes

X12 does not publish a table that pairs each code with remark codes; the payer picks the remark code and prints it beside the CARC on the same remittance line. These X12 remark codes carry wording that speaks to this topic:

• N382 — Missing/incomplete/invalid patient identifier.

Other codes: CARC 32, CARC 33 and CARC 204.

Worked example (hypothetical)

A claim returns a CARC with N30. Eligibility shows the plan ended the previous month. The biller asks the patient for current coverage and bills that payer.

Sources

• X12: Remittance Advice Remark Codes — code text, usage notes and dates (list dated 10/30/2026, retrieved 2026-11-02)
• 42 CFR 405.942 — eCFR, current through 2026-10-29 (retrieved 2026-11-02)

Code descriptions are X12 copyrighted material, quoted here only for the codes on this page and linked to the owner. For the full lists, use X12. The X12 text and the Medicare rule above were read from these pages on November 2, 2026. Causes, checks and examples are general billing practice written for this page, not X12 content. Payers revise code lists, contracts and policies, so confirm anything that affects a claim or a deadline with the payer.