1. The New York Department of Health may retroactively adjust reported monthly enrollment totals, and some of these past period adjustments may not be reflected in the enrollment data presented here.
New York State Department of Health. NYS Medicaid Enrollment Databook. (May 2019-Present).
2. Average monthly enrollment is calculated by UHF by taking an average of each county's monthly enrollment during all months included in the adjustable time frame. The default average monthly enrollment is the reported number of beneficiaries enrolled in Medicaid during the single most recently reported month, e.g., July 2021. This average is used to calculate the percentage of the county population enrolled in Medicaid. County population data is from the American Community Survey 2015-19 5-year population estimates. The New York Department of Health may retroactively adjust reported monthly enrollment totals, and some of these past period adjustments may not be reflected in the enrollment data presented here.
New York State Department of Health. NYS Medicaid Enrollment Databook.
U.S. Census Bureau. American Community Survey, 2016-2020 5-year estimates. Table S0101.
3. Key policy changes included are those that had a sizable impact on total Medicaid enrollment.
Jan 1998-Dec 2008: New York State Department of Health. Medicaid Enrollees and Expenditures by County: Monthly Medicaid Eligibility Reports.
Jan 2009-April 2019: New York State Department of Health. Medicaid Program Enrollment by Month: Beginning 2009.