How to Fill Out and Submit the BCBS Illinois Prior Authorization Form

A BCBS Illinois prior authorization form is submitted by your healthcare provider — through the Availity portal, by fax to the plan-specific line, or through CoverMyMeds for prescription drugs — with the patient’s identifiers, the diagnosis and procedure codes, and the clinical records that show why the service is needed. Patients do not file it themselves. Under the Illinois Prior Authorization Reform Act, BCBSIL must decide standard requests within five calendar days of receiving all necessary information, and urgent requests within 48 hours.¹

What the Form Needs Before You Start

Every BCBSIL prior authorization request, whether entered on a screen or written on a fax cover sheet, asks for the same core information. Missing fields are the fastest way to stall a decision, because the review clock does not start until the insurer has everything it needs.

Patient details: full name, date of birth, and the member ID number printed on the front of the BCBSIL card.
Clinical information: the medical or behavioral health condition, the proposed treatment plan, the date of service, and an estimated length of stay for an admission.
Provider information: the treating provider’s name, office address, and 10-digit National Provider Identifier (NPI).²
Coding: ICD-10 diagnosis codes for the condition, plus CPT or HCPCS codes for the specific service, procedure, or equipment.³
Place of treatment: the facility or setting where care will be delivered.

CPT codes are five-digit numeric codes for physician and clinical services. HCPCS Level II codes start with a letter followed by four digits and cover items like durable medical equipment and ambulance services that CPT does not address. Most administrative denials trace back to a mismatch here: a procedure code that does not logically fit the diagnosis code signals to the reviewer that the service may not fit the clinical picture.

Coverage and review requirements vary by plan, so confirm the member’s specific benefits and PA requirements against the current BCBSIL commercial summary before submitting.⁴⁵ Emergency services are exempt from prior authorization, though an emergency visit that becomes an inpatient admission still requires notification to BCBSIL within one business day (Friday admissions can be reported the following Monday if weekend utilization management staff are unavailable).⁶

How to Submit the Form

Availity Portal

The primary submission route is Availity’s Authorizations & Referrals tool, which sends the request as a standard HIPAA 278 transaction. Any registered Availity user can submit; no separate enrollment is required.⁷ To submit:

Log in at availity.com.
Select Patient Registration, then Authorizations & Referrals, then Authorization Request.
Choose BCBSIL as the payer and select your organization.
Pick a request type and complete the required fields.
Review the entries and submit.

Availity lets providers check pending status and update requests in real time. That visibility is the main advantage over fax: if the request is flagged as incomplete, you can respond the same day rather than waiting for a letter.

Fax

For Blue Cross Community Health Plans (Medicaid) members, medical prior authorization requests fax to 312-233-4060. Behavioral health requests go to a separate line at 888-530-9809.⁶ Sending medical requests to the behavioral line or vice versa routes the request to the wrong review team and delays the decision. Confirm the correct fax number for the member’s plan type before transmitting.

Pharmacy Requests

Prescription drug prior authorizations run on a separate track. BCBSIL’s pharmacy benefits are administered by Prime Therapeutics. Providers can submit the Illinois Uniform Prior Authorization Form for Prescription Benefits by fax to 877-243-6930, or by mail to Prime Therapeutics LLC, Clinical Review Department, 2900 Ames Crossing Road, Eagan, MN 55121.⁸ Electronic submissions go through CoverMyMeds, which is also accessible from the Authorizations menu inside Availity.⁹

Clinical Documentation to Attach

The form itself is a cover sheet. Approval turns on the clinical evidence attached to it. BCBSIL reviewers are licensed physicians or clinical pharmacists, and they need enough documentation to conclude that the service is medically necessary for this specific patient.

A strong supporting package includes recent office visit notes with the patient’s history, exam findings, and the clinical reasoning behind the request. When the treatment sits at the end of a progression, where simpler options were tried first and failed, those earlier attempts have to be documented. A reviewer who cannot see conservative care was attempted will often deny a request for a more aggressive intervention because the record does not show it was warranted.

For procedures that turn on objective findings, attach the relevant diagnostic reports: MRI or CT results, labs, pathology, or other test data that supports the diagnosis. A letter of medical necessity from the treating physician can tie the picture together, explaining why the requested service is the appropriate next step given what the results show.

Label every attachment with the patient’s name and member ID, and arrange documents chronologically so the reviewer can follow the illness without hunting through a disorganized file. Reviewers process high volumes; an organized submission gets a faster and more favorable read.

Step Therapy and Drug Exception Requests

Some pharmacy medications are subject to step therapy, meaning the plan requires the patient to try one or more lower-cost drugs before covering the requested one. If a clinical reason makes the preferred drug inappropriate — an allergy, a documented side effect, or a prior failed course — the prescriber can request an exception on the same uniform pharmacy form. Section H (“other pertinent information”) is where the clinical justification goes. BCBSIL publishes criteria summaries for each medication through Prime Therapeutics, and referencing those criteria in the justification improves the odds of approval.¹⁰ Under Illinois law, the insurer must approve or deny a prescription drug exception request within 72 hours.¹¹

Timeline for a Decision

For standard, non-urgent requests, BCBSIL must issue a decision and notify both patient and provider within five calendar days of receiving all information needed to evaluate the request. For urgent requests, where delay could seriously threaten the patient’s health, the deadline is 48 hours.¹

The clock starts when BCBSIL has everything it needs, not when the request first arrives. If the insurer requests additional records, the countdown resets when that information comes in. This is why a complete first submission is the single biggest speed factor.

Written notification goes to both the provider and the member. Approvals list the authorized service, the approved date range, and any conditions. Denials must state the specific clinical reasons the service was found not medically necessary, along with instructions for appealing.

If the Request Is Denied

Peer-to-Peer Discussion

Before a formal appeal, the treating physician can request a peer-to-peer phone discussion with the BCBSIL medical director who denied the request, adding clinical context that may not have come through on paper. The provider line is 800-981-2795.¹² Two conditions apply: clinical information must have been submitted with the original request (otherwise a peer-to-peer is not available), and for BCCHP members the provider has seven calendar days from the adverse determination to complete the discussion. The alternative within those seven days is submitting new documentation for clinical re-review, but not both. Once a formal appeal is filed, peer-to-peer is no longer an option.

Internal Appeal

If a peer-to-peer does not resolve the denial, the next step is a formal internal appeal. For Blue Cross Community Health Plans members, the appeal must be filed within 60 calendar days of the date on the Notice of Action letter. Filing options: phone at 877-860-2837, fax at 866-643-7069, or mail to Blue Cross Community Health Plans, Attn: Grievance and Appeals Unit, P.O. Box 660717, Dallas, TX 75266-0717.¹³ Urgent appeals involving an ongoing course of treatment must be decided within 24 hours of the plan receiving the required information. Standard appeals must be decided within 15 business days after receipt of the required information.¹¹

External Review

If the internal appeal is also denied, the member can request an independent external review through the Illinois Department of Insurance. An Independent Review Organization with no connection to BCBSIL examines whether the denial was medically appropriate.¹⁴ The request must be filed within four months of the final internal denial letter. IDOI accepts filings through its online Message Center, by email at DOI.externalreview@Illinois.gov, by fax at 217-557-8495, or by mail to 320 W. Washington Street, Springfield, IL 62767. In urgent or life-threatening situations, the provider can file for an expedited external review that runs simultaneously with the internal process. Standard external reviews take roughly 21 to 45 days, and the reviewer’s decision binds the insurer.¹⁵

1
Illinois General Assembly. 215 ILCS 200 – Prior Authorization Reform Act
2
Centers for Medicare & Medicaid Services. National Provider Identifier Standard
3
Centers for Medicare & Medicaid Services. Healthcare Common Procedure Coding System
4
Blue Cross and Blue Shield of Illinois. Prior Authorization
5
Blue Cross and Blue Shield of Illinois. 2025 Commercial Prior Authorization Requirements Summary
6
Blue Cross and Blue Shield of Illinois. Blue Cross Community Health Plans Service Authorization Program Review Tip Sheet
7
Blue Cross and Blue Shield of Illinois. Availity Authorizations
8
Prime Therapeutics. Illinois Uniform Prior Authorization Form for Prescription Benefits
9
Blue Cross and Blue Shield of Illinois. CoverMyMeds
10
Blue Cross and Blue Shield of Illinois. Prior Authorization and Step Therapy Programs
11
Illinois General Assembly. 215 ILCS 134 – Managed Care Reform and Patient Rights Act
12
Blue Cross and Blue Shield of Illinois. Medicaid Providers: Updated Prior Authorization Tips and Peer-to-Peer Discussion Process
13
Blue Cross and Blue Shield of Illinois. Appeals and Grievances
14
Illinois Department of Insurance. How to File an External Review
15
Illinois Department of Insurance. Request for External Review