Observation services are short-term outpatient services received when you are in the hospital for monitoring purposes and/or to determine whether you should be admitted as an inpatient. It is important to know that if you are receiving observation services (sometimes referred to as under observation status), you have not been
Outpatient
Inpatient hospital basics
Part A covers medically necessary inpatient hospital care, which is care that you receive as a formally admitted hospital inpatient. You must be formally admitted into the hospital by a physician in order for your care to be considered inpatient hospital care. You may face different costs if you are