What Is a Critical Access Hospital? A Patient Guide
If you live in a rural area, the closest hospital may be a Critical Access Hospital (CAH). These small, specially designated facilities serve as essential healthcare providers for millions of Americans in underserved communities.
Definition and Purpose
A Critical Access Hospital is a small, generally rural hospital certified by CMS to receive cost-based reimbursement from Medicare. The CAH program was established in 1997 through the Balanced Budget Act to prevent rural hospital closures and ensure access to emergency and basic healthcare services in isolated areas.
Key Requirements
To qualify as a CAH, a hospital must:
- Have no more than 25 acute care inpatient beds
- Maintain an average length of stay of 96 hours or less for acute care patients
- Be located more than 35 miles from another hospital (or 15 miles in areas with mountainous terrain or only secondary roads)
- Provide 24-hour, 7-day-a-week emergency care services
- Be located in a state that has established a Medicare Rural Hospital Flexibility Program
Services Available at CAHs
While smaller than urban hospitals, CAHs provide essential services:
- Emergency care: 24/7 emergency services with stabilization and transfer capabilities
- Inpatient care: Short-stay acute care for conditions manageable at a small facility
- Outpatient services: Lab work, imaging (X-ray, sometimes CT), and outpatient procedures
- Primary care clinics: Many CAHs operate affiliated primary care practices
- Swing beds: Beds that can be used for either acute care or skilled nursing facility-level care
- Telehealth: Virtual connections to specialists at larger hospitals
- Rehabilitation services: Physical therapy, occupational therapy, and speech therapy
When a CAH Can Help vs. When You Need a Larger Hospital
CAHs can typically handle:
- Most emergency stabilization and initial treatment
- Common acute illnesses (pneumonia, infections, dehydration)
- Minor injuries and fractures
- Routine diagnostic testing
- Post-hospital skilled nursing and rehabilitation
Larger hospitals are typically needed for:
- Major surgeries (cardiac, neurological, complex orthopedic)
- Cancer treatment (chemotherapy, radiation)
- Intensive care for critically ill patients
- High-risk pregnancies and neonatal intensive care
- Specialized diagnostic procedures (cardiac catheterization, MRI at some CAHs)
Quality at Critical Access Hospitals
CAHs participate in quality reporting programs, though they may report fewer measures than larger hospitals due to smaller patient volumes. You can find information about CAHs on Medicare Care Compare by searching for hospitals in rural areas.
Data sourced from CMS and the Federal Office of Rural Health Policy. Visit Medicare Care Compare or call 1-800-MEDICARE.
Disclaimer: This article is for informational purposes only. In any emergency, call 911.
Important
This article explains how hospital quality data works and is for general information only. It is not medical advice and must not be used to decide whether to seek, delay or refuse care — that is a decision for you and a clinician who knows your situation.
CMS quality measures describe care delivered during earlier reporting periods and are refreshed roughly quarterly. A hospital's staffing, services and performance can change well before the published numbers do.
hospiguide.org is not affiliated with, endorsed by, or connected to CMS, Medicare, or any U.S. government agency, and publishes no ratings of its own.
Before acting on anything here, verify current details at Medicare.gov Care Compare or call 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048.
HospiGuide.org Editorial Team
Our editorial team explains U.S. hospital quality data using official CMS datasets and government publications. We are not medical professionals, we do not recommend hospitals, and we accept no payment for coverage. Every factual claim is checked against a CMS or federal source. Read our editorial policy.
Related reading
Understanding Hospital Bed Size: What It Means for Your Care
Hospital bed size is one of the basic characteristics used to categorize hospitals. While bigger doesn't always mean better, bed
Hospital Accreditation: Joint Commission vs DNV vs HFAP
Hospital accreditation is a process through which healthcare organizations are evaluated against established standards
How Often Are Hospital Ratings Updated?
Hospital quality ratings are not static — they are updated periodically as new data becomes available. Understanding the update