Quick answer
Optum Behavioral Health manages mental health and substance use disorder benefits for UnitedHealthcare and many other health plans. Most facility-based care, including detox, residential, and inpatient treatment, needs prior authorization, and Optum reviews substance use cases against the ASAM Criteria and mental health cases against LOCUS or its own level of care guidelines.
You call the number on your insurance card expecting your health plan, and the person on the other end says "Optum." That is normal, and it is not a scam. Many plans hand off mental health and addiction benefits to Optum Behavioral Health. The coverage still comes from your plan, but Optum runs the reviews and the authorizations. Once you understand that split, the process stops feeling like a maze and starts feeling like a checklist.
What Optum Behavioral Health actually does
Optum Behavioral Health operates as a behavioral health carve-out. A health plan, such as UnitedHealthcare or an employer-sponsored plan, delegates the management of its mental health and substance use disorder benefits to Optum. Optum then handles authorization decisions, clinical reviews, network credentialing, and utilization management through its Provider Express platform.
For you as a member, the practical effect is this: the phone number and the provider portal you use for behavioral health may be Optum's, even though your medical coverage is administered elsewhere. When a treatment center says they are in network with your plan, the next question is whether Optum manages your behavioral health benefit and whether the facility is in Optum's behavioral network.
Optum describes its substance use disorder approach as connecting members to evidence-based care across the continuum, supported by care advocates and peer support specialists. It also describes a 24/7 substance use disorder helpline that members and their families can call at no additional cost for local provider referrals, and a Facility Benefit Inquiry Program that guides members toward in-network options close to home.
Levels of care and what needs prior authorization
Optum requires prior authorization for most facility-based behavioral health services. Its published prior authorization lists for exchange plans give a concrete picture of what triggers a review:
- Inpatient mental health treatment
- Inpatient substance use detoxification (hospital based)
- Substance use rehabilitation (hospital based)
- Substance use disorder intensive outpatient
- Mental health and substance use disorder partial hospitalization
- Residential treatment, including chemical dependency
Emergency and urgent care do not require prior authorization. Authorization requirements for partial hospitalization and intensive outpatient can vary by the underlying plan's benefit design, so check your specific plan rather than assuming.
In practice, the facility usually submits the authorization request with your clinical information. If a center tells you authorization is handled, ask what was submitted and what Optum's determination was. If you are going out of network or paying a facility directly, expect to be much more involved in that paperwork.
How Optum decides: LOCUS, CALOCUS, and the ASAM Criteria
Medical necessity decisions are reviewed against defined clinical criteria, and Optum's are published. United Behavioral Health, the Optum entity that manages behavioral health, states that it uses:
- The Level of Care Utilization System (LOCUS) for adult mental health level of care determinations
- The Child and Adolescent Level of Care/Service Intensity Utilization System (CALOCUS-CASII) for children and adolescents
- The Early Childhood Service Intensity Instrument (ECSII) for young children
- The ASAM Criteria, from the American Society of Addiction Medicine, for substance-related disorder benefits
- Its own behavioral clinical policies and supplemental criteria
That matters because it means the standard is external and disclosable. If a level of care is denied, you can ask which criteria were applied and why your situation did not meet them, rather than being told only "not covered." ASAM-based review turns on clinical dimensions like withdrawal risk, medical and psychiatric conditions, readiness to change, relapse risk, and the recovery environment you are returning to.
If you are denied, or you are not sure where to start
A denial is not the end of the road. You can appeal, and you can request the clinical criteria behind the decision. Because Optum plans cover behavioral health benefits, federal parity rules under the Mental Health Parity and Addiction Equity Act limit how much more restrictive those benefits, including prior authorization design, can be than the plan's medical and surgical benefits. SAMHSA's "Know Your Rights" parity guide explains how to file a claim, appeal a denial, and what your plan must disclose.
A simpler first step is to call the behavioral health number on your ID card and ask about the level of care you are considering. Optum's own member materials describe the substance use disorder helpline as a no-extra-cost way to get local referrals and confidential help.
If you would rather not navigate the insurance side alone, call (800) 653-9376. The call is free to you, the referral service is paid for by treatment providers, and you will not be lectured about waiting too long. SAMHSA's National Helpline (1-800-662-4357) is another free, confidential option, 24 hours a day.
If you are in crisis right now, call or text 988 for the Suicide and Crisis Lifeline. Call 911 for a medical emergency.
Questions about Optum Coverage
Who is Optum Behavioral Health and why are they involved in my coverage?
Optum Behavioral Health is a behavioral health carve-out company. Many health plans, including UnitedHealthcare and various employer and Medicare Advantage plans, delegate management of mental health and substance use disorder benefits to Optum. That means Optum handles the clinical reviews, authorizations, and network credentialing rather than the plan's general medical department.
Does Optum require prior authorization for rehab?
For most facility-based behavioral health services, yes. Optum's published prior authorization lists for its exchange plans show authorization requirements for hospital-based inpatient substance use detoxification, hospital-based substance use rehabilitation, substance use intensive outpatient, mental health and substance use partial hospitalization, and residential chemical dependency treatment. Emergency and urgent care do not require prior authorization.
What criteria does Optum use to decide if treatment is medically necessary?
Optum Behavioral Health uses nationally recognized criteria. For substance use disorders it applies the ASAM Criteria from the American Society of Addiction Medicine. For mental health services it uses the Level of Care Utilization System (LOCUS) for adults, the child and adolescent version (CALOCUS-CASII), and Optum's own behavioral clinical policies and level of care guidelines.
Does Optum help members who are not sure where to start?
Yes. Optum describes a 24/7 substance use disorder helpline that members and their families can call at no additional cost for local provider referrals and confidential assistance, and it describes a Facility Benefit Inquiry Program that guides members to in-network options close to home.
What if Optum denies coverage?
You can appeal and request the clinical criteria used in the decision. Because Optum plans cover behavioral health benefits, federal parity rules limit how much more restrictive those benefits can be than medical and surgical benefits. SAMHSA's Know Your Rights parity guide explains claims, appeals, and disclosure. If you are in crisis, call or text 988; call 911 for a medical emergency.