A Health Care Provider

This includes providers such as doctors, clinics, psychologists, dentists, chiropractors, nursing homes, and pharmacies, but only if they transmit any information in an electronic form in connection with a transaction for which HHS has adopted a standard.

A Health Plan

This includes Health insurance companies, Health Maintenance Organizations (HMOs), company health plans, and Government programs that pay for health care, such as Medicare, Medicaid, and the military and veterans’ health care programs.

A Health Care Clearinghouse

This includes entities that process nonstandard health information they receive from another entity into a standard (i.e., standard electronic format or data content), or vice versa.