What is the difference between an Acute Care Hospital and a Critical Access Hospital?

Acute Care Hospitals (ACH) are hospitals that provide short-term patient care, whereas Critical Access Hospitals (CAH) are small facilities that give limited outpatient and inpatient hospital services to people in rural areas.  Acute care is being a patient in a Hospital rather than an Urgent Care center.  Critical care is a unit for serious cases that need more one on one care and are normally part of emergency room care.