ACCIDENT AND HEALTH INSURANCE (SIC 6321) Establishments primarily engaged in underwriting accident and health insurance. This industry includes establishments which provide health insurance protection for disability income losses and medical expense coverage on an indemnity basis. These establishments are operated by enterprises that may be owned by stockholders, policyholders, or other carriers. Establishments primarily engaged in providing hospital, medical and other health services on a service basis or combination of service and indemnity bases are classified in Industry 6324.