Blue Cross Blue Shield Fax Number: By Plan & Request

By Michael Chen · Published October 30, 2026 · 10 min read

Quick Answer: There is no single Blue Cross Blue Shield fax number. BCBS is a federation of independent, locally operated companies, and each one prints its own fax lines for prior authorization, appeals and Medicare. Find the member's plan on the ID card, then use the table below, where every BCBS fax number links to the plan page it came from. A practice that faxes Blue plans every week can send from its own number, with a signed BAA, on mFax Business.

Searching for a Blue Cross Blue Shield fax number usually turns up one state's number, and it may belong to a plan your patient isn't on. The Blue Cross Blue Shield Association describes itself as an association of independent, community-based and locally operated companies, and its own page counts 33 BCBS companies. Each of them runs its own prior authorization, appeals and Medicare lines.

Below are the BCBS fax numbers we could confirm on the plans' own websites and PDF forms, all checked on November 13, 2026, with the page each one comes from. Where a plan's site wouldn't load for us, we link the plan instead of printing a number from a third-party list. You'll also find what goes on the cover sheet and how to send PHI to a Blue plan with a business associate agreement in place.

Why There Is No Single BCBS Fax Number

The BCBS fax number you need is set by three things: which Blue company issued the member's card, what kind of plan it is, and what you're sending. Get any one of them wrong and the fax lands with a team that can't act on it.

• The company. Florida Blue, Highmark, CareFirst, Premera, Blue Cross and Blue Shield of Texas and the rest are separate companies. bcbs.com's list of local BCBS companies maps each state to its plan, and some states have more than one.
• The plan type. Commercial, Medicare Advantage, Part D, Medicaid and the Federal Employee Program each have their own intake teams, even inside one company.
• The request. Prior authorization, clinical records for an open case, a provider appeal, a member appeal and a grievance usually go to different lines.

A patient treated outside their home state is a fourth case. The BlueCard program routes eligibility and benefits questions to the home plan; the BlueCard line both Texas and Washington plans print is 800-676-2583 (800-676-BLUE).

Two plans you may be looking for have their own pages. Anthem is the Blue licensee in 14 states, and our Anthem fax number guide lists its lines state by state. Aetna is not a Blue plan at all; its numbers are in our Aetna fax number guide.

BCBS Fax Numbers at a Glance

Every number in this table comes from the plan's own website or PDF form, read on 2026-11-13. Find the member's plan and the request, then check the plan's section below for the conditions that come with the line.

BCBS Prior Authorization Fax Numbers

The Blue plans we checked point providers to Availity first for prior authorization and keep fax as the fallback. When a plan prints a fax line for prior authorization, it usually sits on the provider contact page next to the portal link.

Blue Cross and Blue Shield of Texas and Illinois (Medicare Advantage)

Blue Cross and Blue Shield of Texas and of Illinois are both divisions of Health Care Service Corporation, as each site's footer says, and their Medicare Advantage contact lines match. The provider contact pages for Texas and Illinois list prior authorization and out-of-network referrals at phone 877-774-8592 and fax 855-874-4711, beside the Availity and EviCore links. The Oklahoma and New Mexico provider pages print the same fax.

The member Medicare contact pages for Texas and Illinois print the prior authorization fax as 1-855-847-4711, with the last two groups of digits swapped. The two pages don't match, and we can't tell which one is right. Call 877-774-8592 and confirm the line before you send, and keep the delivery receipt with the case.

For commercial plans, both companies send claim reconsiderations through Availity and take the Claim Review form by mail. Their claim review page calls the electronic route "preferred over faxed/mailed claim disputes" and prints no commercial fax line.

Premera Blue Cross (Washington)

Premera's provider contact page is unusually direct about what goes where:

• Prior authorization request forms: fax 800-843-1114.
• Inpatient admission notification forms and related medical records: fax 888-742-1487.
• Individual plans: care management fax 888-302-9325; claims and clinical appeals go by mail to PO Box 21702, Eagan, MN 55121.

Premera's one-page provider contact list (dated 08-20-2025) adds the provider appeals fax below and a separate line for FEP.

Plans whose sites we couldn't verify

We tried the provider pages of Florida Blue, Highmark, Blue Cross and Blue Shield of North Carolina, Blue Cross and Blue Shield of Massachusetts, Horizon Blue Cross and Blue Shield of New Jersey, CareFirst, Independence Blue Cross and BlueCross BlueShield of Tennessee, and none of them would load for us on November 13. We don't print their numbers from secondhand lists. Start from the plan's own site and its provider section:

Blue Cross Blue Shield Appeal Fax Numbers

Appeals are where BCBS fax numbers matter most, because an appeal has a deadline and the fax receipt is your proof you met it. Members and providers usually have different lines, and Medicare appeals never share a line with commercial ones.

Member appeals

• Blue Cross Blue Shield of Michigan (commercial): the optional appeal form says to mail it to 600 E. Lafayette Blvd., M.C. 1620, Detroit, MI 48226-2998, "or fax it to 877-522-4767." Attach the records you want considered, plus the Designation of Authorized Representative form if someone else is filing for you.
• AZ Blue: member appeals and grievances go to the Medical Appeals & Grievances Coordinator, fax 602-544-5601, or by email to appeals@azblue.com. Expedited appeals use the same fax, with the treating provider's certification attached.

Provider appeals

• Premera Blue Cross: Physician and Provider Appeals, fax 425-918-5592, for all provider appeals except those for FEP members.
• AZ Blue: the BlueCard claim appeals form goes to 602-544-5601, with all relevant documentation attached. AZ Blue returns forms that are missing required information.
• Blue Cross and Blue Shield of Texas, Medicaid: provider medical appeals and complaints for STAR, CHIP and STAR Kids go to 855-235-1055, or by mail to the Complaints and Appeals Department, P.O. Box 660717, Dallas, TX 75266-0717.

Medicare Advantage and Part D appeals

Blue Cross Medicare Advantage in Texas and Illinois also takes contracted and non-contracted provider claim disputes at 1-855-674-9192. Its standalone Blue Cross MedicareRx (PDP) plans list a separate standard drug appeals fax, 1-800-693-6703, on the Texas Medicare contact page.

BCBS Federal Employee Program Fax Numbers

The Federal Employee Program (FEP) has no general fax line. fepblue.org's contact page lists phone numbers and mailing addresses only. Local Blue plans run FEP contact lines of their own (Premera and Blue Cross and Blue Shield of Texas both list them), so an FEP fax number is usually a local plan's FEP line or a number printed on a specific form.

What FEP does publish:

• Pharmacy tier exceptions: the Tier Exception Member Request Form goes to Service Benefit Plan, Attn: Reconsideration, P.O. Box 52080, Phoenix, AZ 85072-2080, fax 1-877-378-4727. fepblue.org links it from its claim forms page; the PDF is hosted by CVS Caremark.
• Pregnancy blood pressure monitor: the request form goes to BCBSA–FEP, PO Box 29104, Shawnee Mission, KS 66201, fax 1-512-714-5126.
• A local plan's FEP line: Premera's provider contact list gives FEP in Washington its own customer service line (800-562-1011) and fax (425-918-5338). Other states have their own; check the local plan's FEP page.

FEP appeals follow the disputed claims process in Section 8 of the Service Benefit Plan brochure. FEP's guide to disputing a claim (PDF) says you ask the plan in writing to reconsider within 6 months of its decision. If you still disagree, you can take it to the Office of Personnel Management (OPM). Send the reconsideration where Section 8 and your decision letter tell you to.

Medical Records and Claims: When Not to Fax

Most Blue plans don't take medical claims by fax. Claims go electronically through Availity or a clearinghouse, or on paper to the claims P.O. box for the plan. Texas and Illinois, for example, prefer claim reconsiderations through Availity to "faxed/mailed claim disputes." Fax is for the paperwork around a claim: prior authorization forms, clinical records a reviewer asked for, appeals and grievances.

Medical records follow the request. When a Blue plan asks for records on an open case, the letter or portal message names the fax line and the reference number. Premera is the one plan here that prints a standing line for them: inpatient admission notifications and their records go to 888-742-1487. Everywhere else, use the number on the request letter. Our guide on how to fax medical records covers how to pack them.

What to Put on the Cover Sheet

A cover sheet is how a Blue plan's intake team matches your fax to a member and a case. Without the right identifiers, records can sit unmatched until someone calls you.

Put these on every fax to a BCBS plan:

1. Member name, member ID (with its three-letter prefix) and date of birth. The prefix identifies the home plan.
2. The reference number: the authorization number, case number or claim ID from the plan's letter.
3. What you're sending: "prior authorization request", "records for case #…", "Level 1 appeal".
4. For provider requests: your NPI, TIN and a callback fax number for the plan's reply.
5. The page count, so the plan can tell if pages are missing.

Keep the diagnosis and clinical details in the attached pages, not on the cover sheet. Mark it confidential with a HIPAA notice. Our medical fax cover sheet guide has a layout you can copy.

How to Fax BCBS from Your Computer or Phone

You don't need a fax machine to reach a Blue plan. In mFax the steps are the same in the browser and in the apps:

A delivered fax proves the transmission, not that a reviewer has read it. If a BCBS plan says nothing arrived, the receipt is your proof that it did. Our guide to the fax confirmation page explains what it proves in an appeal.

If the status says Failed, the row names the reason. No fax tone or Declined usually means you dialed a phone number rather than a fax line, so check it against the plan's page. Recipient busy lines are retried automatically.

Faxing PHI to Blue Cross Blue Shield: What HIPAA Requires

HIPAA lets a practice fax patient records to a health plan. What the practice must add is a business associate agreement with the service that carries the fax. HHS's page on covered entities and business associates explains why: a fax service that handles a practice's PHI is one of its business associates. Our BAA for fax service guide covers what that agreement should say.

mFax Business covers that part for a practice that faxes Blue plans:

• A BAA on every plan, at no extra cost. The workspace owner opens Settings, chooses Review & sign on the Business Associate Agreement row, both sides sign electronically, and the row shows Signed with the date.
• What a privacy officer asks about: AES-256 encryption at rest and TLS 1.2+ in transit, SOC 2 Type II, PHI stored and processed in the US, a confirmed-or-failed status on every fax, and every teammate signing in with their own login.
• Your practice's own fax number. Blue plans fax decisions and records requests back. The team fax line puts them in a shared Received list instead of on a machine in the hallway.
• Fax from email, too. Staff can send to the plan's number at send.mfax.to, so Premera prior authorization becomes 18008431114@send.mfax.to, and attach the PDF. The subject and body become the cover sheet, so keep patient details in the attachment.

Plans start from about $9/mo, and you build your own from the seats and pages you need. For the wider rules, see our HIPAA-compliant fax guide.

Faxing your own appeal as a member? HIPAA's rules bind plans, providers and their business associates, not a member sending their own records. If you have one form to send, the mFax app sends it from your phone or browser, free for 7 days.

Fax Blue Plans from Your Practice's Own Number

There is no single Blue Cross Blue Shield fax number, so a practice that bills several Blue plans ends up with a list of lines. mFax Business gives each of those faxes a delivery receipt and sends them from your practice's own fax number, with HIPAA-compliant faxing and a signed BAA, on web, mobile and desktop. Build your own plan from about $9/mo, and cancel anytime.