Illinois Medicaid Behavioral Health Billing: Manuals, Codes and Payers
Illinois Medicaid publishes a Community-Based Behavioral Services provider handbook, and most members are in a HealthChoice Illinois plan. This page lists the handbook, the plans, and the codes we could confirm. Checked against state sources on 9/30/26.
Get My Free ConsultationIn this guide
- ✓ The HFS behavioral services handbook
- ✓ HealthChoice Illinois plans with provider links
- ✓ Codes listed in the 2025 handbook
- ✓ What to research live
Illinois Medicaid Billing at a glance
This page covers illinois medicaid billing for behavioral health claims: where the state provider manuals and code lists live, and which HCPCS codes apply to psychotherapists and psychiatrists. Rules vary by state and by payer, so confirm current requirements with the state Medicaid agency before you bill.
Use this Illinois Medicaid Billing guide as a starting point. Illinois Medicaid Billing rules differ by plan, so check whether a claim goes to the state fee-for-service program or to a managed care plan. Keep a copy of the current Illinois Medicaid Billing manual your practice follows, and review your Illinois Medicaid Billing process whenever the state issues an update.
Illinois Medicaid at a glance
State manuals and fee schedules
| Document | What it covers |
|---|---|
| Illinois HFS | The state Medicaid agency. |
| Chapter 200 provider handbooks | Includes the Community-Based Behavioral Services provider handbook dated 2/4/2025. |
| HealthChoice Illinois | The managed care program and plan information. |
Managed care plans and payer sites
| Payer | Provider site |
|---|---|
| Aetna Better Health of Illinois | Providers |
| Blue Cross Community Health Plans | Medicaid provider index |
| CountyCare | Providers |
| Meridian (including YouthCare for DCFS youth) | Providers |
| Molina Healthcare of Illinois | Medicaid manual |
Aetna's dual-eligible plan became a fully integrated dual eligible special needs plan on 1/1/2026.
HCPCS codes we could confirm
The HFS Community-Based Behavioral Services provider handbook (2/4/2025) lists H2000, H2011, H0004, H2015, T1502, H2010, H0034, T1016 and T1019. Check the handbook for each code's service name, modifiers and unit. H2015 stays flagged as an unverified in-home code in our guides.
What is changing
- We did not confirm a current HFS behavioral health fee schedule; the practitioner fee schedule we found may be out of date.
- Plan rosters and contracts change. Confirm the current list with HFS before you bill.
Current as of 9/30/2026. Reconfirm before you bill.
Illinois Medicaid billing: frequently asked questions
Where is the Illinois Medicaid behavioral health handbook?
On the HFS Chapter 200 handbooks page. The Community-Based Behavioral Services handbook is dated 2/4/2025.
Who pays Illinois Medicaid claims?
Most members are in HealthChoice Illinois: Aetna Better Health, Blue Cross Community Health Plans, CountyCare, Meridian or Molina.
Which codes does the Illinois handbook list?
H2000, H2011, H0004, H2015, T1502, H2010, H0034, T1016 and T1019. Confirm each in the handbook.
Where this information comes from
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