This class includes all activities for human health not performed by hospitals or by medical doctors or dentists. This involves activities of, or under the supervision of, nurses, midwives, physiotherapists or other para-medical practitioners in the field of optometry, hydrotherapy, medical massage, occupational therapy, speech therapy, chiropody, homeopathy, chiropractice, acupuncture, etc. These activities may be carried out in health clinics such as those attached to firms, schools, homes for the aged, labour organizations and fraternal organizations, in residential health facilities other than hospitals, as well as in own consulting rooms, patients' homes or elsewhere. Included are the activities of dental auxiliaries such as dental therapists, school dental nurses and dental hygienists, who may work remote from the dentist but who are supervised periodically by the dentist.

Also included are clinics pathological and other diagnostic activities carried out by independent laboratories, of any kind, activities of blood banks, ambulance and air-ambulance activities, residential health facilities except hospitals,etc.

Exclusions: Production of artificial teeth, dentures and prosthetic appliances by dental laboratories are classified in class 3311 (Manufacture of medical and surgical equipment and orthopaedic appliances).

Testing activities in the field of food hygiene are classified in class 7422 (Technical testing and analysis).