Washington Medicaid Program Overview
Enrollment, funding, and managed care facts for Washington Medicaid.
Get Washington's Medicaid Fee Schedule →Enrollment
Washington Medicaid covered approximately 1.79-1.98M people. Two independent sources give different figures for different reporting periods: KFF's monthly enrollment tracker reports 1,786,049 for Washington as of May 2026, while CMS's 2024 Medicaid Managed Care Enrollment and Program Characteristics report cites 1,984,868 total Medicaid enrollees (2024 data). The gap is consistent with the ongoing post-pandemic continuous-enrollment 'unwinding,' which reduced enrollment nationally between 2024 and 2026, not a data-quality problem.
Funding & federal match
Washington has adopted ACA Medicaid expansion, effective 2014-01-01.
For FFY2026 (Oct 1, 2025 - Sep 30, 2026), Washington's Federal Medical Assistance Percentage (FMAP) is 50%.
Waivers
Washington operates Medicaid managed care under the Medicaid Transformation Project 2.0 (MTP 2.0), a Section 1115 demonstration waiver. Section 1115 demonstration renewal effective July 1, 2023 through June 30, 2028. Expands coverage and access to care, advances whole-person primary/preventive/home- and community-based care, and funds care-delivery and payment innovation focused on health-related social needs (HRSN). Includes continuous eligibility for postpartum individuals up to 193% FPL, continuous eligibility for children ages 0-5, and coverage of HRSN services.
Frequently Asked Questions
Get Washington's Free Medicaid Fee Schedule
Request actual Washington 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
- MACPAC - MACStats: Medicaid and CHIP Data Book, February 2026 (Exhibit 6, compiling HHS Federal Register FMAP notices)
- KFF State Health Facts - Federal Matching Rate (FMAP) and Multiplier
- KFF State Health Facts - Status of State Action on the Medicaid Expansion Decision
- healthinsurance.org - Medicaid eligibility and enrollment in Washington
- Washington State Health Care Authority - Medicaid Transformation Project (MTP)
- Washington State Hospital Association - Renewal of Washington State 1115 Waiver (MTP 2.0)
Data last verified 2026-09-17. Also see our free Medicaid Fee Schedule tool.