Medicaid Billing for Therapists: A State-by-State Overview

Medicaid is a joint federal-state program covering low-income individuals. Unlike Medicare, Medicaid rules — including which provider types are covered, what rates are paid, and how to enroll — vary significantly by state. This guide covers the structure you need to understand before billing Medicaid for mental health services.

Medicaid vs Medicare: The Key Difference

Medicare is a federal program with nationally consistent rules (though administered through regional MACs). Medicaid is federally funded but state-administered, meaning every state has its own fee schedule, provider enrollment process, and coverage rules. A therapist enrolled in Medicaid in California cannot bill Medicaid in Texas without enrolling separately there.

Medicaid Managed Care Organizations (MCOs)

Most states have shifted their Medicaid programs to a managed care model. Rather than billing the state Medicaid program directly (fee-for-service), you bill a Medicaid Managed Care Organization — a private insurer contracted by the state to administer Medicaid benefits.

Each MCO has its own network, credentialing process, and fee schedule. In a state with three MCOs, a therapist may need to credential with each MCO separately to see clients enrolled in each plan. Common MCOs include Centene, Molina Healthcare, Anthem (Medicaid division), and Amerigroup.

Enrolling as a Medicaid Provider

1. Identify your state's Medicaid agency (usually the Department of Health or Human Services)
2. Complete the state Medicaid provider enrollment application — many states use an online portal
3. Submit NPI, license, tax ID, and required documents
4. If your state uses MCOs, separately apply to each MCO network you want to participate in
5. Await enrollment approval (typically 60–120 days; MCO credentialing may take longer)

Medicaid Coverage for Therapy Services

Medicaid must cover mental health services under the Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) mandate for beneficiaries under 21. For adults, coverage varies by state but most states cover individual psychotherapy billed with standard CPT codes (90832, 90834, 90837, 90791).

Medicaid Clients Cannot Use OON Superbills

This is a critical point: Medicaid beneficiaries cannot seek reimbursement from Medicaid for out-of-network services. Medicaid does not have a standard out-of-network benefit like commercial insurance. If a therapist is not credentialed with the client's Medicaid plan, the client must pay out of pocket — they cannot submit a superbill to Medicaid for reimbursement. Medicaid is different from commercial OON coverage in this fundamental way.

ABA and Autism Carve-Outs

Applied Behavior Analysis (ABA) services for autism are often “carved out” of standard Medicaid managed care in many states — meaning they're covered under a separate administrative contract, often with a specialized ABA MCO. If you provide ABA services, check whether your state carves these out and which MCO or state entity administers the ABA benefit.

FQHC Billing Rates

Federally Qualified Health Centers (FQHCs) are reimbursed by Medicaid at a Prospective Payment System (PPS) rate — a bundled per-visit rate that is typically higher than the standard Medicaid fee schedule for individual services. If you work at an FQHC, billing is handled under the FQHC's provider number at the PPS rate, not the standard CPT fee schedule.

Medicaid vs Commercial OON: The Bottom Line

Superbilled is designed for out-of-network providers whose clients have commercial insurance (Aetna, BCBS, Cigna, etc.) that includes an OON benefit. Medicaid and traditional Medicare clients cannot use this OON superbill pathway. If you see both Medicaid and commercial OON clients, maintain separate billing workflows for each population.