What Is a Critical Access Hospital?
Published: 10 June 2026 · Written by: HospitalGuide Medical Editorial Board
What is a Critical Access Hospital and who does it serve?
A Critical Access Hospital (CAH) is a small rural hospital in the United States granted special Medicare certification to ensure healthcare access in remote areas. CAHs are limited to 25 inpatient beds, must be located more than 35 miles from another hospital, and receive cost-based Medicare reimbursement rather than standard fixed rates — keeping rural healthcare financially viable.
CAH Certification Requirements
To qualify as a Critical Access Hospital under the Medicare Rural Hospital Flexibility Program, a facility must meet all of the following criteria:
- Located in a rural area, at least 35 miles from the nearest hospital (or 15 miles over secondary roads in mountainous terrain)
- No more than 25 acute inpatient beds
- Average length of stay of 96 hours or fewer for acute care patients
- 24/7 emergency care services
- Designated by the state as a necessary provider
Why CAH Status Matters
Without CAH designation, many rural hospitals would close because standard Medicare rates do not cover the high per-patient costs of low-volume facilities. Cost-based reimbursement means Medicare pays 101% of allowable costs, keeping rural hospitals financially viable. As of 2025, there are approximately 1,378 CAHs across the United States.
Services Typically Offered
Despite their small size, CAHs provide essential services: emergency care, basic surgery, obstetrics (in some), radiology, laboratory, and outpatient clinics. Complex cases are stabilised and transferred to a larger regional hospital.
Frequently Asked Questions
How many Critical Access Hospitals are there in the USA?
As of 2025, approximately 1,378 hospitals hold Critical Access Hospital designation across 45 states. Texas, Missouri, Iowa, and Kansas have the highest concentrations.
Does a CAH provide the same quality care as a larger hospital?
For emergency stabilisation and routine inpatient care, CAHs meet the same federal quality standards as larger hospitals. For complex procedures requiring specialist volume, transfer to a larger centre is standard practice.
Is a Critical Access Hospital the same as a rural hospital?
Not all rural hospitals are CAHs. CAH is a specific Medicare certification with strict criteria. A rural hospital that does not meet the distance or bed-count requirements operates under standard acute care reimbursement rules.
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