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Highmark Fax Number — Authorizations, Claims, and Appeals

Highmark, a Blue Cross Blue Shield insurer operating in Pennsylvania, West Virginia, Delaware, and New York, routes faxes by department, plan, and region, so there is no universal number. A prior-authorization fax uses the line printed on the authorization form for that service or medication, and an appeal fax appears on the denial notice you are disputing. Providers verify current fax lines through Highmark's Provider Resource Center, while members find claims and customer-service contacts on the ID card. Because a commercial plan and a Medicare Advantage plan can route differently, match the fax line to the plan and state on the card before sending.

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Highmark Fax Number

Use the fax line printed on your Highmark prior-authorization form, denial letter, or the back of your member ID card for that plan and state

Hours: Highmark utilization management and appeals teams generally operate Monday through Friday during business hours by region. Fax lines receive documents around the clock, but anything sent outside business hours is queued for the next working day.

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What You Can Fax to Highmark

  • Prior-authorization and pre-service requests
  • Claim submissions and corrected claims
  • Appeals and grievances after a denial
  • Coordination-of-benefits and other-coverage forms
  • Clinical records and documentation supporting a review
Tip: A Highmark fax about a patient is protected health information, so send it through a HIPAA-eligible service and label every page with the member ID, plan name, and date of birth so nothing is lost if pages separate. Send FAX Mail's HIPAA-eligible Business plan ($79.99/month) fits this and returns a transmission receipt you can attach to the case as proof the fax arrived before the authorization or appeal deadline. Put the authorization or claim reference number on the cover sheet so reviewers can match it to the open request.

Faxing to Highmark — FAQ

Yes. Highmark serves several states through separate regional operations, and each publishes its own fax lines on the matching forms. Confirm the member's state and plan first, then use the authorization or appeal form built for that region.

Specialty and pharmacy authorizations often use a different intake team than medical services, with their own fax line on the specialty request form. Download the current form for that drug from the Provider Resource Center and use the fax line in its instructions.

The appeal filing window is stated on the Highmark denial letter or Explanation of Benefits, and it differs for expedited versus standard reviews. Fax before that date and retain the transmission receipt, since the timestamp documents when your appeal was received.

Highmark encourages electronic claim submission, but certain corrected claims or attachments may be accepted by fax as noted in the Provider Resource Center. Follow the channel the guidance specifies for that claim type and keep your delivery confirmation.

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