Maryland Gov. Larry Hogan urged congressional leaders to reinstate the Children's Health Insurance Program (CHIP).
Hogan sent a letter to leaders of both parties in Congress on Tuesday.
CHIP provides more than 146,000 low-income children in Maryland with health care coverage.
According to officials, the program could run out of money by April.
Gov. Hogan said Maryland would lose an estimated $30 million in federal funds in fiscal year 2018 alone. That would increase to $121 million in fiscal year 2019.
According to Gov. Hogan, the potential worst-case outcome places "a tremendous financial and administrative burden on our state and sows fear and confusion among some of our most vulnerable populations."
The Associated Press contributed to this report.