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Blue Cross Blue Shield Fax Number — Fax Claims and Prior Authorizations

Blue Cross Blue Shield isn't a single company but a federation of independent local plans, so the fax line you need depends on which BCBS plan holds the policy. Claims, prior authorization requests, enrollment changes, and appeals each route to their own department, and those numbers are usually printed in your policy materials. Getting the right department on the first try is the difference between a clean submission and one that sits unprocessed.

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Blue Cross Blue Shield Fax Number

Contact your local BCBS plan for fax number

Hours: Blue Cross Blue Shield claims department typically operates Monday-Friday, 8:00 AM - 6:00 PM ET.

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What You Can Fax to Blue Cross Blue Shield

  • Medical claims
  • Prior authorization requests
  • Enrollment and disenrollment forms
  • Provider credentialing documents
  • Appeals and grievances
Tip: Add your policy number, and the claim number when there is one, to every page so the document attaches to your record. For prior authorizations, include the diagnosis code, procedure code, and the clinical justification, since a request missing those details often gets returned. A delivery confirmation from Send FAX Mail gives you proof of submission if a claim or authorization is later questioned.

Faxing to Blue Cross Blue Shield — FAQ

Blue Cross Blue Shield is a group of independent local plans, each with its own departments and fax lines. Check your policy documents or call your specific plan to get the correct number for your need.

Yes. Fax the claim with your policy number and claim number on every page, and keep the Send FAX Mail confirmation as proof you submitted it.

Standard claims are generally handled within about 30 days. Prior authorizations depend on urgency, with urgent requests often decided in 24 to 72 hours.

Include the diagnosis code, procedure code, and a clear clinical justification up front. Requests that arrive complete avoid the back-and-forth that delays a decision.

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