Critical Access Hospital (CAH)
A Critical Access Hospital (CAH) is a small rural facility, generally limited to 25 inpatient beds, that receives cost-based Medicare reimbursement to preserve healthcare access in underserved areas. The designation carries specific staffing, distance, and length-of-stay requirements set by CMS.
What is a Critical Access Hospital (CAH)?
A Critical Access Hospital (CAH) is a small rural facility that holds a special Medicare designation created to keep essential healthcare available in sparsely populated or remote areas. The designation comes with defined limits, generally no more than 25 inpatient beds and a restricted average length of stay, along with distance criteria meant to ensure the hospital genuinely serves an underserved location.
What sets a CAH apart financially is that Medicare reimburses it on a cost basis rather than through standard prospective payment rates. This cost-based approach is intended to keep these often financially fragile hospitals viable.
Why do Critical Access Hospitals matter?
CAHs are frequently the only source of emergency and inpatient care for miles, so their survival is directly tied to rural access to medicine. The cost-based reimbursement model exists precisely because such low-volume facilities could not sustain themselves under the rates designed for larger hospitals.
Their distinct payment and regulatory framework also shapes how they staff, what services they offer, and how they coordinate transfers for patients who need a higher level of care. Understanding the CAH category is important for anyone analyzing rural healthcare delivery and the economics that support it.
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