Medicaid enrollment is two layers, not one
Every state Medicaid enrollment has two parts: (1) the state's fee-for-service (FFS) Medicaid program, which issues the Medicaid ID, and (2) the managed care organizations (MCOs) that actually run most Medicaid lives in that state — Anthem, Molina, Centene / Ambetter, WellCare, CareSource, and regional plans. You cannot bill an MCO until the state Medicaid ID is issued.
Group-before-individual states
Most states require the group entity to enroll and receive a Medicaid ID before individual providers can be linked. Common examples include Texas (TMHP), New York (eMedNY), California (Medi-Cal PAVE), Florida, and Illinois. Filing individuals first in a group-first state = automatic rejection.
Typical timelines
- State FFS Medicaid ID: 60–120 days (Texas and California often run longer).
- MCO roster load: 30–90 days after the state ID is issued.
- Retro-effective dates: some states allow 90–365 days of retro billing; others allow none.
What you need before filing
- State-specific portal registration (PAVE in CA, TMHP in TX, eMedNY in NY, etc.).
- Group NPI, TIN, W-9, IRS CP-575 letter.
- Ownership disclosure (5% ownership threshold triggers additional forms).
- Fingerprinting for owners in high-risk provider categories.
- State-specific site visit if the provider category is deemed moderate/high risk.
ABA and behavioral health notes
ABA revenue lives almost entirely in Medicaid — commercial pays a small fraction. Every state has its own ABA provider type (some require BCBAs to enroll individually; others credential only the group). See BCBA credentialing and ABA credentialing services.
How Credify handles Medicaid
Credify Health files state Medicaid, tracks the state ID, and then loads every MCO roster the day it's allowed. We keep the group-first sequencing right in every state. Related: Medicare enrollment.