Which behavioral health services require prior authorization?

Higher levels of care most often require authorization: intensive outpatient (IOP), partial hospitalization (PHP), residential and inpatient treatment, and detox. Psychological and neuropsychological testing, TMS, and ongoing therapy beyond a plan's visit threshold can also require it. Requirements vary by payer and plan.

What is the difference between prior, concurrent, and retrospective authorization?

Prior authorization is approval obtained before services begin. Concurrent review extends authorization for ongoing care, such as additional days in a treatment program. Retrospective review is requested after services are delivered and is harder to win, so it should be a last resort.

How do you prevent prior authorization denials?

Verify authorization requirements before the first visit, obtain authorization before services start, track expiration dates and submit concurrent reviews on time, and document medical necessity against the payer's criteria (such as ASAM or LOCUS). Missing or expired authorization is one of the top causes of behavioral health denials.

Denial Management · June 15, 2026 · 6 min read

Prior Authorization for Behavioral Health: How to Reduce Denials

Missing or expired authorization is one of the single biggest causes of behavioral health denials, and one of the most preventable. Here's how authorization actually works and how to stop it from costing you revenue.

Which services need authorization

Routine outpatient therapy often doesn't require authorization, but higher levels of care almost always do:

Intensive outpatient (IOP) and partial hospitalization (PHP)
Residential and inpatient treatment, and detox
Psychological and neuropsychological testing
Transcranial magnetic stimulation (TMS)
Ongoing therapy beyond a plan's visit threshold

Requirements vary by payer and plan, so verification per patient is essential.

Prior vs. concurrent vs. retrospective

Type	When	Notes
Prior	Before services begin	The standard, get it before the first session
Concurrent	During ongoing care	Extends authorization (e.g., more program days)
Retrospective	After services delivered	Hard to win, a last resort, not a plan

How to prevent authorization denials

Verify before the first visit. Confirm whether the service needs authorization for that specific plan.
Authorize before services start. Retroactive approval is the exception, not the workflow.
Track expirations. Authorizations lapse mid-treatment, submit concurrent reviews on time.
Document medical necessity. Map your notes to the payer's criteria (such as ASAM for SUD or LOCUS).

Where automation helps most

Authorization is a tracking problem at scale, and tracking problems are where software wins. An AI behavioral health billing specialist surfaces authorization requirements before the visit, tracks expiration dates, and flags claims at risk of an authorization denial, especially valuable for addiction treatment programs, where multi-tier authorizations and concurrent review are constant. For the bigger picture, see our guide to behavioral health claim denials.

For general reference only. Authorization rules vary by payer and plan and change, always verify current requirements with the patient's plan.

Stop losing claims to missed authorizations.

See how Stable surfaces and tracks authorizations before they turn into denials.

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