This major group includes establishments primarily engaged in furnishing medical, surgical, and other health services to persons. Establishments of associations or groups, such as Health Maintenance Organizations (HMOs), primarily engaged in providing medical or other health services to members are included, but those which limit their services to the provision of insurance against hospitalization or medical costs are classified in Insurance, Major Group 63. Hospices are also included in this major group and are classified according to the primary service provided.

Industry groups 801 through 804 includes individual practitioners, group clinics in which a group of practitioners is associated for the purpose of carrying on their profession, and clinics which provide the same services through practitioners that are employees.