Illinois Medicaid Program Overview
Enrollment, funding, and managed care facts for Illinois Medicaid.
Get Illinois's Medicaid Fee Schedule →Enrollment
Illinois Medicaid covered approximately 2.94-3.42M people. Two independent sources give different-period figures for total Illinois Medicaid/CHIP enrollment: KFF's state indicator (2,939,165, May 2026) and CMS's 2024 Medicaid Managed Care Enrollment and Program Characteristics report (3,418,634 total Medicaid enrollees, July 1, 2024). A third source, healthinsurance.org, reports ~3.2 million as of August 2025, falling between the two and tracing the same declining trend. Consistent with continued post-pandemic 'unwinding' enrollment decline, not a data error. Reported as a range rather than a single false-precision number.
Funding & federal match
Illinois has adopted ACA Medicaid expansion, effective 2014-01-01.
For FFY2026 (Oct 1, 2025 - Sep 30, 2026), Illinois's Federal Medical Assistance Percentage (FMAP) is 51.82%.
Delivery system & managed care
A large share of Illinois Medicaid is delivered through managed care organizations (MCOs) rather than fee-for-service — estimates range from 75.1-75.6% of Medicaid enrollees.
Waivers
Illinois operates Medicaid managed care under the Illinois Continuity of Care and Administrative Simplification Waiver, a Section 1115 demonstration waiver. Gives Illinois flexibility in Medicaid program design/administration to support continuity of care during eligibility transitions and administrative simplification. Approved June 19, 2021, current expiration December 31, 2025; the state is seeking a further extension through December 31, 2030.
Illinois operates Medicaid managed care under the Illinois Healthcare Transformation Waiver, a Section 1115 demonstration waiver. Provides additional program flexibility to support Illinois's Medicaid delivery-system transformation efforts. Five-year extension approved July 2, 2024, effective through June 30, 2029.
Frequently Asked Questions
Get Illinois's Free Medicaid Fee Schedule
Request actual Illinois Medicaid reimbursement rates by billing code — free, delivered as a CSV.
Sources
- KFF State Health Facts - Total Monthly Medicaid & CHIP Enrollment
- CMS - Medicaid Managed Care Enrollment and Program Characteristics, 2024
- Federal Register / GPO - Federal Financial Participation in State Assistance Expenditures, FFY2026 FMAP Notice (2024-27910)
- Illinois Department of Healthcare and Family Services - HR 1's Impact on Illinois Medicaid
- KFF - Status of State Action on the Medicaid Expansion Decision
- healthinsurance.org - Medicaid eligibility and enrollment in Illinois
- MACPAC - MACStats Medicaid and CHIP Data Book, Exhibit 29 (Percentage of Medicaid Enrollees in Managed Care by State, July 1, 2022)
- Medicaid.gov - Illinois Continuity of Care and Administrative Simplification, Section 1115 Demonstration and Waiver List
- Illinois Department of Healthcare and Family Services - 1115 Demonstration Waiver Home
- Medicaid.gov - Illinois Healthcare Transformation, Section 1115 Demonstration and Waiver List
Data last verified 2026-09-17. Also see our free Medicaid Fee Schedule tool.