TL;DR: Prior authorization rules for outpatient PT differ by payer. UnitedHealthcare Medicare Advantage lets up to six follow-up visits within eight weeks of the evaluation proceed without full clinical review (you still submit for the whole plan of care), while Cigna, Aetna, and BCBS plans each run state- and plan-specific processes. Verify eligibility and authorization status before the first visit, and document measurable goals and functional limitations.

Prior authorization remains one of the most common points of friction in outpatient physical therapy billing. Understanding payer-specific rules helps you submit complete requests and reduce denials.

What are UnitedHealthcare’s rules?

UnitedHealthcare Medicare Advantage made notable changes effective January 2025. Up to six follow-up visits after the initial evaluation can proceed without a full clinical review when visits occur within eight weeks. You still submit a request for the full plan of care. The initial evaluation itself does not require prior authorization in most cases.

How do Cigna, Aetna, and BCBS plans handle prior auth?

Cigna, Aetna, and many Blue Cross Blue Shield plans maintain their own processes. Requirements often differ by state and specific plan. Some plans require authorization after a set number of visits. Others review the entire episode upfront. Check each payer’s provider portal for current forms and turnaround times.

What changed for Medicaid managed care?

Community Plan expanded its prior authorization footprint in several states. Kansas, North Carolina, and Virginia saw updates effective November 2025. These changes affect how you document medical necessity for Medicaid-managed care patients.

What documentation supports approval?

Documentation that supports the plan of care remains essential. Include measurable goals, functional limitations, and expected visit frequency. Missing or vague notes frequently trigger denials or requests for additional information.

The 8-minute rule still governs timed codes. Pair it with proper use of GP, GO, or GN modifiers when required. Payers cross-check these elements during review.

How do you prevent “no auth on file” denials?

You can reduce delays by verifying eligibility and authorization status before the first visit. Many practices now run real-time checks through clearinghouses or payer portals. This step prevents claims from hitting the “no auth on file” wall later.

What do you do when prior auth is denied?

When a denial arrives, review the exact reason code. Common triggers include incomplete plans of care, missing progress notes, or visits that exceed the authorized amount. Resubmit with the missing elements rather than appealing immediately in many cases.

Link your internal workflow to the revenue cycle management process we run for outpatient therapy practices. Clear authorization tracking belongs inside your daily billing routine.

Staying current with each payer’s portal and policy updates protects your revenue. Set calendar reminders to review major payer bulletins quarterly.

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