AppealFlow

Insurer appeals contact directory

Insurer appeal phone numbers and portals are printed on your member ID card and denial letter. This directory lists common U.S. health plan appeal entry points—including UnitedHealthcare member services numbers patients search for—so you can confirm routing before you fax or upload records.

How to use this directory

Phone numbers and portal URLs change. Treat this list as a starting point and verify appeal fax lines, mailing addresses, and PBM routing on your member ID card and adverse benefit determination letter. Pharmacy denials often go to the PBM listed on your EOB, not the medical claims address on the back of your card. Medicaid managed care and Medicare Advantage plans may use different appeal vendors than the brand name on marketing materials.

What to have ready before you call

Member ID, group number, date of service, claim number, denial reason code, and the name of the provider who billed the service. Ask for the appeal tracking number and whether the plan requires a specific form for first-level review. If the representative gives a fax number, read it back digit by digit and ask whether a coversheet is required.

After you confirm the contact

Draft your letter with the free generator at /generate or a specialty tool, then file through the official portal when available. Certified mail remains useful when the plan accepts paper appeals. Save proof of submission, including portal confirmation PDFs and tracking numbers for overnight delivery.

ERISA self-funded employer plans

Large employers often use third-party administrators. The number on your card may route to general member services; ask specifically for the appeals and grievances unit. Federal claims procedure rules in 29 CFR 2560.503-1 require written adverse benefit determinations and appeal rights for many group health plans. Your summary plan description may list a different administrator than the insurer brand on your card.

ACA and fully insured plans

Individual and small-group policies regulated under state insurance law often follow appeal standards aligned with 45 CFR 147.136 for non-grandfathered coverage. External review may be available after a final internal denial. Confirm whether your state uses the federal external review process or a state-specific portal.

Medicare and Medicaid routing

Original Medicare appeals flow through Medicare Administrative Contractors; Medicare Advantage and Part D use the private plan's appeal hierarchy first. Medicaid appeals depend on whether your state fee-for-service or a managed care organization administers your benefits. Always start with the instructions on the denial notice for your program, not a commercial insurer entry in this directory.

Matching payer-specific guides

When your insurer appears in this directory, open the linked payer appeal guide for filing tips that match that brand's portal habits. Combine directory contact verification with a letter from /generate or a specialty generator so your packet is complete before you call. Guides cover common denial types such as prior authorization and step therapy for that carrier's wording.

Step-by-step: verify then file

Step one: locate the adverse benefit determination and highlight the appeal address, portal URL, and deadline. Step two: compare that information to this directory and your ID card; if they differ, use the denial letter. Step three: call member services only to confirm fax or portal routing, not to argue medical merits on the phone. Step four: generate your letter and attach clinical records listed in the denial. Step five: submit before the deadline and store confirmation. Step six: if denied internally, ask the representative how to request external review in writing.

Common mistakes

Filing pharmacy appeals to the medical claims fax on the card. Using a national customer service number when the denial lists a dedicated appeals unit. Missing expedited review for urgent care when your clinician supports it. Assuming a parent brand's portal works for a regional Blue Cross plan without checking your subscriber ID prefix.

What to do next

After you confirm contacts, use /tools/appeal-deadline-calculator to plan filing dates, /tools/denial-code-lookup to interpret EOB codes, and /generate for a first-level letter. For checklists and exhibit lists, see /products/appeal-pack. For state external review contacts after a final denial, browse /tools/state-external-review.

Optional Appeal Pack

If you want checklists, deadline worksheets, and exhibit lists in one download after you confirm the correct fax or portal, see /products/appeal-pack. Document preparation only — not legal advice.

Frequently asked questions

Why do phone numbers in this directory differ from my card?
Plans rebrand lines, use regional routing, and separate pharmacy from medical appeals. Your current denial notice and ID card override any directory entry.
Can I appeal by phone instead of writing?
Some plans allow phone grievances for certain issues, but medical necessity and claim denials usually require a written internal appeal with records. Follow the method on your adverse benefit determination.
Where do I send a UnitedHealthcare or Aetna appeal?
Use the fax, portal, or mailing address on your denial letter. This directory lists commonly searched member lines to reach appeals routing, then confirm the submission address in writing.
Does calling member services start my appeal?
Generally no. A phone call does not replace a filed appeal unless the plan documents say otherwise. Keep proof of formal submission.
What if my employer is self-funded?
Appeals may go to a third-party administrator. Ask HR or the plan administrator listed in your summary plan description for the appeals unit, not only the insurer logo on the card.
How does AppealFlow help after I find a number?
Generators produce letters and checklists you submit yourself. We do not call insurers on your behalf.

Numbers change. Always use the customer service and appeal address on your current denial notice.