My plan denied the claim saying it's a pre-existing condition. Is that allowed?

Health insuranceDeniedChecked Nov 6, 2026

From K.Actuary, founded by Sangmin Kwon, ASA · sources checked 2026-11-06 · Source: GovInfo · 45 CFR § 147.108 «Prohibition of preexisting condition exclusions» · paragraph (a) View original ↗

In short

Health plans can't refuse to pay because of a health problem you had before.
If the letter says pre-existing, point to that rule in your appeal.
Appeal within 180 days of the notice.

What this means

A pre-existing condition is a health problem you had before your coverage began. Federal rules say group plans and insurers may not exclude coverage for it [1]. HealthCare.gov says Marketplace plans must cover these conditions [2].

The denial notice must give the specific reason. It must also name the plan provisions the decision rests on [3]. Read it to see which rule the plan used. For an employer group plan, you have at least 180 days after the notice to appeal [4].

Your next step

Read the denial notice for the reason and the plan provision it names, then ask the plan in writing for the claim documents [5]. For an employer group plan, send the appeal within 180 days of the notice [4]. Ask the plan how long it will take to decide [6].

Check it yourself

Open HealthCare.gov, Marketplace health plans cover pre-existing conditions, at https://www.healthcare.gov/health-care-law-protections/pre-existing-conditions/ and read the part quoted above. Read the dates and the reason on your own denial notice. Your own plan papers hold details these sources do not give: "Don't know yet" for your case.

Where this comes from (6)

[1] GovInfo · 45 CFR § 147.108 «Prohibition of preexisting condition exclusions» · paragraph (a) · checked 2026-11-06
A group health plan, or a health insurance issuer offering group or individual health insurance coverage, may not impose any preexisting condition exclusion
[2] HealthCare.gov · checked 2026-11-06
All Marketplace plans must cover treatment for pre-existing medical conditions. No insurance plan can reject you, charge you more, or refuse to pay for essential health benefits for any condition you had before your coverage started
[3] GovInfo · 29 CFR § 2560.503-1 «Claims procedure: notice of an adverse benefit determination» · paragraph (g)(1) · checked 2026-11-06
The specific reason or reasons for the adverse determination; (ii) Reference to the specific plan provisions on which the determination is based
[4] GovInfo · 29 CFR § 2560.503-1 «Claims procedure: appeal time» · paragraph (h)(3)(i) · checked 2026-11-06
Provide claimants at least 180 days following receipt of a notification of an adverse benefit determination within which to appeal the determination
[5] GovInfo · 29 CFR § 2560.503-1 «Claims procedure: appeal rights» · paragraph (h)(2)(iii) · checked 2026-11-06
Provide that a claimant shall be provided, upon request and free of charge, reasonable access to, and copies of, all documents, records, and other information relevant to the claimant's claim for benefits
[6] GovInfo · 29 CFR § 2560.503-1 «Time for the decision on review» · paragraph (i)(2)(i)–(iii) · checked 2026-11-06
In the case of a claim involving urgent care, the plan administrator shall notify the claimant, in accordance with paragraph (j) of this section, of the plan's benefit determination on review as soon as possible, taking into account the medical exigencies, but not later than 72 hours after receipt of the claimant's request for review of an adverse benefit determination by the plan … In the case of a pre-service claim…

How we found this

We matched your question to 6 official sources, quoted the exact lines, and re-checked each quote against its source on 2026-11-06.

What we don’t know yet

Your own plan or notice may say something different. If your letter cites another rule, send it and we will look again.

Every answer is checked against the official rule it quotes.

Information only — not legal advice. Your plan, insurer or agency decides.

This answer quotes the official sources listed above, with the date we checked them. Your own policy, notice and state rules control. We are not your lawyer or your insurer. We don’t file, argue or negotiate claims for you — you send any letter or form yourself.

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