Most states require that they work under the supervision of a physician.
This means that the numbers do not carry other information about healthcare providers, such as the state in which they live or their medical specialty.
There are two categories of health care providers for NPI enumeration purposes.
: The National Provider Identifier NPI is a unique identification number for covered health care providers.
, hospitals, home health agencies, ambulance companies are considered Entity Type 2 Organization providers.
In some states, they may prescribe medications.