The Place of Service Description for 23 is "A portion of a hospital where emergency diagnosis and treatment of illness or injury is provided." We are staffed and equipped like an ER for emergency diagnosis and treatment, not like an office that "routinely provides ..."
Q3) What license is required by a hospital? Do you mean accreditation?
Q4) What is the simplest way and minimal requirements to be accredited (or licensed if that is required) as a hospital?