Selection of level of E/M services
for the following categories/subcategories, all three of the key components must meet or exceed the level stated in the code description: office or other outpatient services, new patient, hospital observation services, initial hospital care, office consultation, inpatient consultation, Emerg.dept. services, initial nursing facility care, other nursing facility services, domiciliary, rest homes, or custodial care services, new patient, home services, new patient; office or other outpatient services, est. patient, subsequent hospital care, subsequent nursing facility care, domiciliary, rest home, est.pt, homes services, est. pt.