Subsector 621 - Ambulatory Health Care Services
621111
 Offices of Physicians (except Mental Health Specialists)
621112
 Offices of Physicians, Mental Health Specialists
621210
 Offices of Dentists
621310
 Offices of Chiropractors
621320
 Offices of Optometrists
621330
 Offices of Mental Health Practitioners (except Physicians)
621340
 Offices of Physical, Occupational and Speech Therapists and Audiologists
621391
 Offices of Podiatrists
621399
 Offices of All Other Miscellaneous Health Practitioners
621410
 Family Planning Centers
621420
 Outpatient Mental Health and Substance Abuse Centers
621491
 HMO Medical Centers
621492
 Kidney Dialysis Centers
621493
 Freestanding Ambulatory Surgical and Emergency Centers
621498
 All Other Outpatient Care Centers
621511
 Medical Laboratories
621512
 Diagnostic Imaging Centers
621610
 Home Health Care Services
621910
 Ambulance Services
621991
 Blood and Organ Banks
621999
 All Other Miscellaneous Ambulatory Health Care Services–