Blue Cross Blue Shield Denied Prior Authorization Denied: How to Appeal" class="auto-link">Prior Authorization: How to Appeal

A prior authorization denial from Blue Cross Blue Shield can halt your planned treatment before it begins. Whether BCBS denied a PA for surgery, advanced imaging, specialty drugs, or behavioral health services, you have the right to appeal — and success rates are meaningful when you know what to include.

How BCBS's Prior Authorization Process Works

Blue Cross Blue Shield requires prior authorization for a wide range of services. Authorization is typically requested by your provider (not the member) through:

• The BCBS plan's provider portal (varies by plan — e.g., Availity for Anthem BCBS, Navicure for others)
• Phone: the provider services line on your insurance card
• Fax: provider authorization fax line listed in the provider directory

BCBS evaluates PA requests using its published Medical Policies and clinical criteria (often MCG/Milliman guidelines or proprietary standards). If the clinical documentation submitted does not meet those criteria, the PA is denied.

Common Reasons BCBS Denies Prior Authorizations

• Incomplete clinical documentation: The most common reason. The provider submits a PA request with insufficient clinical notes — missing imaging, missing documentation of conservative treatments tried, or lacking specific functional criteria.
• Step therapy not completed: BCBS requires that specified first-line treatments be tried before authorizing alternatives. For drugs, this means trying generic or lower-tier options first. For procedures, this may mean physical therapy before surgery.
• Service not covered: The requested service may be excluded from your specific plan or classified as investigational under BCBS's medical policies.
• Wrong level of care requested: For behavioral health, BCBS may approve a lower level of care than requested.
• Missing prior authorization altogether: Services performed without any PA request automatically trigger denial when the claim is submitted.

How to Appeal a BCBS Prior Authorization Denial

Step 1 — Request a Peer-to-Peer Review (Fastest Path) Before filing a formal appeal, ask your physician to request a peer-to-peer review — a direct call with the BCBS medical director who reviewed the request. Many PA denials are reversed at this step when the full clinical picture is presented. Call the provider services number on your insurance card to arrange a peer-to-peer.

Step 2 — File a Formal Internal Appeal Most BCBS plans allow 180 days from the denial date to file a written appeal:

• Your BCBS plan's member portal
• Mailing address on your denial letter
• Member services phone number on your insurance card

Step 3 — Build a Comprehensive Appeal Package

• Your provider's letter of medical necessity addressing BCBS's specific criteria point by point
• Complete medical records supporting the clinical necessity
• Documentation of all prior treatments attempted (especially for step therapy appeals)
• Specialty society clinical guidelines or practice standards supporting the requested service
• The specific BCBS Medical Policy number cited in the denial and your direct rebuttal

Step 4 — Urgent / Expedited Appeal If the denial involves urgent care — an imminent surgery, medication needed immediately, or active inpatient stay — request an expedited appeal. BCBS must respond within 72 hours.

Step 5 — External Independent Review: Complete Guide" class="auto-link">External Review and Escalation

• ERISA plans: DOL EBSA — 1-866-444-3272
• State-regulated plans: State insurance commissioner
  • California: DMHC — 1-888-466-2219
  • Texas: TDI — 1-800-252-3439
  • Illinois: DOI — 1-866-445-5364
  • Michigan: DIFS — 1-877-999-6442
  • Florida: DFS — 1-877-693-5236

Step Therapy Exception Rights

If your PA was denied because BCBS requires step therapy and you have already tried the required first-line treatments (or they are contraindicated), state law may protect you. Many states require BCBS to grant a step therapy exception in these circumstances. Your appeal should explicitly cite your state's step therapy exception law.

FEHB Plan Considerations

If your BCBS plan is a Federal Employee Health Benefit (FEHB) plan, final appeals that cannot be resolved within BCBS go to the U.S. Office of Personnel Management (OPM) — not the Department of Labor. OPM: 1-888-767-6738.

Fight Back With ClaimBack

BCBS prior authorization denials are frequently overturned when the right clinical documentation is provided. ClaimBack helps you build an appeal that directly addresses BCBS's specific criteria.

Start your free appeal at ClaimBack

Related Reading

• Common Reasons Insurance Claims Are Denied
• What Is Medical Necessity?
• How to Write an Insurance Appeal Letter