Critical Access Hospital
A Medicare designation for small, remote hospitals that provides cost-based reimbursement to help keep essential rural care viable.
SDG 3 Good Health & Well-beingWhat is it?
A Critical Access Hospital (CAH) is a federal Medicare designation for small rural hospitals — up to 25 inpatient beds, with specific distance and length-of-stay criteria — created by the 1997 Balanced Budget Act to stem rural closures after earlier payment changes.
Why does it matter?
CAHs receive cost-based Medicare reimbursement rather than standard prospective payment, improving the financial viability of low-volume hospitals that would otherwise struggle to stay open in remote areas.
How does it work?
To qualify, a hospital must be located a set distance from other hospitals (or be state-certified as necessary), maintain no more than 25 acute beds, keep an average inpatient stay of 96 hours or less, and offer 24/7 emergency services. In return Medicare pays roughly 101 percent of allowable costs.
Who benefits?
Small rural communities that retain a local hospital and emergency department, and the hospitals themselves, which gain a more predictable payment basis for Medicare patients.
Who may be disadvantaged?
The designation caps size and stay length, so growing or higher-acuity communities may find it constraining; cost-based payment also does not fully protect hospitals with very low overall volume.
What evidence exists?
CMS and the Rural Health Information Hub document the CAH program’s design and its role in stabilizing rural hospital finances; there are over 1,300 CAHs across the United States.
What tradeoffs exist?
Cost-based reimbursement preserves access but can be more expensive per case for Medicare and offers weaker efficiency incentives than prospective payment; the bed and stay limits restrict scope.
Common misconceptions
CAH status is not a guarantee against closure — cost-based Medicare payment helps, but hospitals with heavy Medicaid, uninsured, or commercial exposure can still fail financially.
What you can do next
See how CAH designation supports broader rural healthcare access, and how rural health clinics extend outpatient care where hospitals are scarce.