Covered entities under HIPPA must use NPI's to identity health care providers in HIPPA standard transactions. The NPI number is required to submit claims or conduct other transactions specified by HIPPA. By definition, a health care provider" is an individual, group or organization that provides medical or other health service or supplies." This would include physicians an other practitioners, physician/practitioner groups, institutions such as hospitals, laboratories and nursing homes, health maintenance organizations and suppliers such as pharmacies and DME companies. However, it does not include health industry workers such as admissions and billing personnel, housekeeping staff, orderlies and those who support the provision of health care, but do not provide health care services.