Celtic denied your claim in Delaware. Here is your deadline.

You are not alone, and here is the measured version of that sentence: 6,979 in-network claims were denied by Celtic Insurance Company in Delaware in a single plan year. A denial rate is a fact about an insurer's book of business. It is not a judgment about you, and it is not the last word on your claim.

• Of the 3 insurers reporting a denial rate in Delaware, Celtic Insurance Company is the first highest at 28.2%. The highest in the state is 28.2% and the lowest is 19%.
• That is 9.5 percentage points above the 18.7% national average across this dataset, and 8.5 points above the Delaware average of 19.7%.
• Behind the percentage: 24,728 in-network claims were processed under 17 plans in Delaware, and 6,979 of them came back denied.
• Not one of those denials reached independent external review, the stage whose decision the plan is required by law to accept, and where nationally 32.8% are overturned.
• Its most-recorded denial reason is service excluded from the plan at 23.3% of its categorized denials, against 11.6% nationally, a heavier share than the country as a whole. That is the denial mix, not an outcome rate.
• In Delaware, Celtic Insurance Company reported 28.2%, and the same company files in 8 other states in this file, where the rate is not the same in any of them: 24% in Oklahoma, 21.4% in Alabama, 19% in Kansas, down to 16.1% in Arkansas. Which state the plan was bought in moves the odds more than the brand on the card does.
• Celtic Insurance Company accounts for 1.6% of every in-network claim denied in Delaware in this file.
• By raw volume it is the 149th largest source of denials among the 158 insurer-state records in the file that report one.
• After that, its second-most-recorded reason is referral required, 1,111 claims, 16.3% of its categorized denials.
• Third on its own list is not medically necessary, 1,032 claims, 15.2% of what Celtic Insurance Company categorized in Delaware. Between them the top three account for 54.8% of its categorized denials.
• Where Celtic Insurance Company differs most from the national mix is service excluded from the plan: 23.3% of its categorized denials in Delaware against 11.6% across the file.
• Read the other way round: 17,749 of those 24,728 in-network claims were paid, 71.8% of everything Celtic Insurance Company processed in Delaware.
• Spread across the 17 plans it reports in Delaware, that is about 411 denied claims per plan, on about 1,455 claims processed per plan.
• Its reason columns add up to 6,799 categorized rows against 6,979 denials, 97.4% of them, and every reason share on this page is a share of that first figure rather than of the second.
• Its smallest recorded category in Delaware is provider out of network, 292 claims, 4.3% of what Celtic Insurance Company categorized there.
• Against the file as a whole, this one record is 0% of the 84,502,749 in-network claim denials reported by every issuer in it.

What happened to appeals

What that record means for your own Celtic Insurance Company letter, and by when. Celtic Insurance Company recorded 6,979 denials in Delaware and no separately reported appeal outcome, so this page cannot tell you how its Delaware appeals went, the Celtic Insurance Company rows in the plan-year 2026 release of the CMS Transparency in Coverage file, read September 5, 2026 (data.healthcare.gov). Whichever way that lands, nobody files the appeal for you, and the filing runs on a clock set by which plan you hold: an employer or Marketplace plan gives you at least 180 days from the denial notice to file the internal appeal (29 CFR 2560.503-1(h)(3)(i), carried onto individual-market coverage by 45 CFR 147.136(b)(3)(i)), while Medicare Advantage gives you 60 calendar days after you receive its notice (42 CFR 422.582(b)) and Medicaid managed care the same 60 calendar days from the date on the notice (42 CFR 438.402(c)(2)(ii)), both stages free, and the three steps above are the whole of what to do tonight, so take the date printed on your Celtic Insurance Company notice and file well inside whichever of those windows is yours. The free steps are above; the $29 kit is the same clock with the letters pre-filled for Celtic Insurance Company in Delaware. One payment. No subscription. No cut of your claim.

Celtic Insurance Company inside Delaware

Your denial did not happen in a national average. It happened in a state market, alongside 2 other insurers reporting into the same federal file, and these are that market's own figures.

• Across the whole of Delaware, the 3 insurers reporting in this file processed 2,232,506 in-network claims and denied 440,631 of them, a state denial rate of 19.7%. Celtic Insurance Company is one of those 3.
• That puts Delaware eighth of 30 states by denial rate, 1 points above the 18.7% national average, before you get to what Celtic Insurance Company did inside it.
• Delaware recorded 253 internal appeals against those denials: one appeal for every 1,742 claims the state's insurers refused.
• Not one denial in Delaware reached independent external review in the reported year, not Celtic Insurance Company's and not any other insurer's in the state. That is the stage whose decision the plan is required by law to accept.
• The reason Delaware's insurers record most often is other reasons, 167,165 claims, 64.2% of the state's categorized denials. Celtic Insurance Company records service excluded from the plan most often instead, which is the argument your letter will need to answer.
• The other insurers a Delaware reader could have bought from run from 28% (AmeriHealth Caritas VIP Next, Inc.) to 19% (Highmark BCBSD Inc.). Celtic Insurance Company at 28.2% sits above all of them.
• Put the two together and Celtic Insurance Company is responsible for 1.6% of every in-network claim denied in Delaware in this release, from 1.1% of the claims the state's insurers processed.
• Every Delaware figure in this section is that state's own row in the same federal file Celtic Insurance Company's numbers above come from, CMS Transparency in Coverage Public Use File (PY2026 release, PY2024 claims), data.healthcare.gov — US Government public domain, and the full Delaware page is free at /states/delaware.

What Celtic Insurance Company denies most

The most common denial reason recorded for Celtic Insurance Company plans in Delaware is service excluded from the plan. How that denial is beaten →

The last column is each reason's share of all categorized denials nationally, so you can see where Celtic Insurance Company's mix in Delaware differs from everyone else's. This is denial mix, not overturn rate by reason, the federal file does not report appeal outcomes broken down by denial reason, and we do not imply otherwise.

The three steps at the top of this page are the whole of what you have to do tonight. The longer version, what the internal appeal has to contain, how the independent stage works, and how to ask for expedited handling when waiting would seriously jeopardize your health, is published free here.

Who appeals what at Ambetter (Centene), the insurer's own routing table

Ambetter (Centene) publishes a table of which denial scenarios are appealed by you, the member ("customer appeal") and which only your health care provider can appeal. Almost no patient ever sees it, and appealing a denial that only your provider has standing to appeal burns time inside a fixed window. Quoted from Ambetter (Centene)'s published policy (a page written for health care providers (Texas plan page)), checked 2026-08-25. It is brand-level and applies to Celtic Insurance Company in Delaware the same as to every other Ambetter (Centene) entity in the file.

Operational facts from the same policy

• Medical-necessity appeal window: 180 calendar days
• Standard resolution clock: 30 calendar days
• Expedited appeal clock: 1 working day / 72 hours from complete information
• Submission (Texas plan): Complaints Department, 5900 E. Ben White Blvd., Austin, TX 78741 · Fax 1-866-683-5369 , Texas plan's address — each state plan publishes its own.
• Member appeal window: 180 calendar days, orally or in writing , Member-side confirmation of the 180-day window; also confirms the 30-day resolution clock ('shall not exceed 30 calendar days from the date Ambetter receives the appeal') and the expedited 1-working-day / 72-hour-written clock.
• Member APPEALS address differs from the complaints address: Appeals Department, 5900 E Ben White Blvd., Austin, TX 78741 · Fax 1-866-918-2266 , Same street address as the Complaints Department but a different fax: appeals go to 1-866-918-2266, grievances/complaints to 1-866-683-5369. The plan page's complaints fax is not the appeals fax.
• External review via MAXIMUS: four months from the final internal decision; standard decided ≤45 days, expedited ≤72 hours , Route: Externalappeal.com, fax 1-888-866-6190, or mail to MAXIMUS Federal Services, 3750 Monroe Avenue, Suite 705, Pittsford, NY 14534. Matches the federal 4-month right this site publishes.

Sources: Ambetter (Centene), "Grievance and Appeals (Ambetter from Superior HealthPlan, Texas)", quoted, not paraphrased; audience: health care providers (Texas plan page); checked 2026-08-25. Ambetter (Centene), "Appeals and Grievances Guide (Ambetter from Superior HealthPlan, Texas — member guide, last updated December 2024)", quoted, not paraphrased; audience: members; checked 2026-08-26. Brand-level policy, applied here because Celtic Insurance Company is an Ambetter (Centene) entity. Your own denial letter and plan documents govern your specific case.

Questions

Everything you need for your Celtic Insurance Company appeal in Delaware: your two deadlines, the argument that fits your denial reason, the letters, the clinician brief, and the external review request. One payment. No subscription. No cut of your claim. Opens on screen the moment you pay. 14-day refund, no questions, one email to hello@getaxionlabs.com.