OFFICES AND CLINICS OF OTHER HEALTH PRACTITIONERS (SIC 804) Establishments of licensed practitioners having the degree of D.C. and engaged in the practice of chiropractic medicine. Establishments of licensed practitioners having the degree of O.D. and engaged in the practice of optometry. Establishments where receipts are primarily from the sale of optical goods prescribed as a result of eye examinations performed at another establishment are classified in Retail Trade, Industry 5999. Establishments of licensed practitioners having the degree of D.P. and engaged in the practice of podiatry. Establishments of health practitioners engaged in practice in health fields not elsewhere classified, such as acupuncturists, midwives, nutritionists, physical and occupational therapists, and psychologists.