Puerto Rico's Medicaid Cliff Returns in FY2028. It's Already Priced at an 86.5% Cut.

Puerto Rico's Medicaid program is not financed the way the 50 states' are.▸ States draw an open-ended federal match set by a per-capita-income formula, with no ceiling. The territories, Puerto Rico included, operate under a fixed annual dollar ceiling — the Section 1108 allotment — and a matching rate set directly in statute rather than calculated from income, per MACPAC, the commission Congress created to advise it on Medicaid policy. That statutory rate was 55 percent for decades. The Consolidated Appropriations Act, 2023 raised it, and raised the ceiling with it — but only through fiscal year 2027. What replaces both when the law lapses is not speculation. It is a formula Washington has already run once.

MACPAC's August 2025 financing brief lays out the mechanics plainly: "the federal government matches territory dollars up to the specified annual Section 1108 allotment, and beyond that, the territories generally must fund their programs with local funds."▸ There is no equivalent ceiling for any of the 50 states. Puerto Rico currently covers about 1.3 million people through Medicaid and CHIP — roughly 40 percent of its population — per CMS's own state overview.

The Consolidated Appropriations Act, 2023 (P.L. 117-328) set Puerto Rico's Federal Medical Assistance Percentage (FMAP) at 76 percent, effective December 29, 2022 through September 30, 2027 — up from the statutory territorial baseline of 55 percent that had applied for decades, per KFF's accounting of the law.▸ The same law set the annual funding ceiling on an upward ramp for five years.

Both the higher match rate and the higher ceiling run out together, at the end of FY2027 — a little over a year from now.

What happens next isn't an open question.▸ Absent new legislation, the FY2028 allotment resets to a base year fixed at FY2019, adjusted only for the medical-care component of the Consumer Price Index — not extended from the enhanced FY2027 level. Congress has let this same cliff approach twice before and pulled Puerto Rico back from it each time. In between, the formula was actually run: for FY2022, the Department of Health and Human Services tried to calculate the allotment using FY2020 as the base year instead of FY2019, arriving at $2.943 billion. The U.S. Government Accountability Office ruled that unlawful in a November 15, 2021 decision, finding that "section 1108(g), by its plain language, directs HHS to use FY 2019" — and calculated what that statutory formula actually produces: $406.4 million, an 86.5 percent cut from the enhanced level then in effect. Congress overrode the result with emergency legislation before it took effect. The formula itself was never repealed; it was postponed. It is due again in FY2028, this time against a base of $3.825 billion rather than the roughly $2.9 billion HHS was distributing when GAO ran the numbers.

Puerto Rico's local share of every Medicaid dollar nearly doubles — from 24 cents to 45 cents — the same year the dollar amount it's a share of is set to collapse toward the FY2019 base GAO already priced.

Whatever Congress does with the financing formula, it will land on a workforce that federal data already counts as stretched thin.▸ HRSA's own quarterly count of Health Professional Shortage Areas, current as of June 30, 2026, designates 42 primary-care shortage areas in Puerto Rico, covering 574,059 people, where the ratio of providers to population meets just 28.9 percent of the need HRSA's formula requires to lift the designation — 138 more primary-care clinicians would be needed to close the gap. Dental shortage areas cover 2,292,005 people — about seven in ten Puerto Ricans — at 48.0 percent of need met. Mental health is the widest gap of all: 74 designated shortage areas covering 1,140,925 people, at just 8.3 percent of need met, the lowest of any discipline HRSA tracks on the island.

Notably, every one of Puerto Rico's 42 primary-care HPSAs is designated by facility or population group — clinics, health centers, specific underserved populations — not by open geography; HRSA's table shows zero geographic-area primary-care designations on the island.▸ That means the shortage count above is a floor, not a ceiling: it measures only the areas that met HRSA's threshold for formal designation, not every neighborhood where a resident might struggle to find a doctor.

Figures reflect the funding structure and workforce-shortage designations as of the most recent federal reporting available at publication. Congress has extended Puerto Rico's enhanced Medicaid financing twice before FY2027; it could do so again before the FY2028 reversion takes effect.