Maryland: Medicaid expansion enrollment up 20% since COVID hit; total Medicaid up 12%


I've once again relaunched my project from last fall to track Medicaid enrollment (both standard and expansion alike) on a monthly basis for every state dating back to the ACA being signed into law.

For the various enrollment data, I'm using data from's Medicaid Enrollment Data Collected Through MBES reports. Unfortunately, they've only published enrollment data through December 2020. In some states I've been able to get more recent enrollment data from state websites and other sources.

Today I'm presenting Maryland. For enrollment data from January 2021 on, I'm relying on adjusted estimates based on raw data from the Maryland Health Department.

Total Medicaid enrollment in Maryland (including expansion) hovered around 1.2 million for a few years prior to the COVID pandemic hitting last February. Since then, enrollment in non-ACA Medicaid has increased 9.6% while ACA expansion enrollment has gone up by 20%, for an overall increase of 12.2% statewide.

Maryland has 6,177,224 residents according to the 2020 U.S. Census. As of April 2021:

  • around 1.4 million are enrolled in Medicaid overall, or nealry 40% of the population
  • around 1.03 million are enrolled in non-ACA Medicaid
  • around 374,000 are enrolled in ACA Medicaid expansion.
  • Add in the ~131,000 subsidized ACA exchange enrollees and that's around 505,000 Maryland residents who would lose healthcare coverage if the Supreme Court strikes down the Affordable Care Act, or 8.2% of the state population.