Denial Code 27: What It Means and How to Appeal

Expert analysis: how this denial is overturned

An eligibility denial means the plan says you were not covered on the date of service, or had not met a waiting, residency, or spend-down requirement. The first step is verification: confirm your effective dates, enrollment records, and premium status, because these denials often stem from data errors at the plan or employer. If you were in fact covered, the appeal is straightforward once you supply enrollment confirmation and proof of coverage for the relevant dates. The denial is an adverse benefit determination, so the full-and-fair-review standard of 29 CFR 2560.503-1(h)(1) applies, with at least 180 days to appeal under 29 CFR 2560.503-1(h)(3)(i). Be aware that determinations about plan membership or eligibility are generally excluded from the federal external review process under 45 CFR 147.136(d)(1)(i), so the internal appeal and the enrollment record are your key tools. Honest odds: eligibility denials reverse readily when coverage on the service date can be documented.

Sources: 29 CFR 2560.503-1 (ERISA claims procedure), 45 CFR 147.136 (ACA internal and external review), and the X12 Claim Adjustment Reason Code standard.

Frequently asked questions

What does denial code 27 mean?

Expenses incurred after coverage terminated.

Is denial code 27 appealable?

Yes. Denials like this are frequently overturned when the appeal supplies the missing element and cites the plan's own rules. We do not publish a percentage for this category because we will not show a number we cannot back.

What should I send to appeal a code 27 denial?

Supply the missing element for this code, a short appeal letter citing the plan's claims-procedure rules, and any clinical support. Apellica prepares and files this for you.