NAICS 3 Digit Subsector Code 621

Subsector 621

NAICS Subsector Code 621 – Ambulatory Health Care Services

Definition of NAICS 3 Digit Subsector Code 621: Industries in the Ambulatory Health Care Services subsector provide health care services directly or indirectly to ambulatory patients and do not usually provide inpatient services. Health practitioners in this subsector provide outpatient services, with the facilities and equipment not usually being the most significant part of the production process.

Three Digit Subsector Breakdown for the North American Industry Classification System

NAICS codes are broken down by digit. The broadest description starts with the 2 digit sector codes. The 3 digit subsector codes are more specific, then the 4 digit industry group, 5 digit industry, and the most specific is the 6 digit NAICS code. If NAICS Subsector 621 does not describe the industry of the business in question, then select the largest applicable code below. From there, follow the progression of smaller digits to the larger digits in order to obtain the most specific 6 digit classification.

  • Sector 62: Health Care and Social Assistance
    • Subsector 621: Ambulatory Health Care Services
      • Industry Group 6211: Offices of Physicians
        • Industry 62111: Offices of Physicians
          • 6 Digit Code(s) NAICS 621111: Offices of Physicians (except Mental Health Specialists)
          • 6 Digit Code(s) NAICS 621112: Offices of Physicians, Mental Health Specialists
      • Industry Group 6212: Offices of Dentists
        • Industry 62121: Offices of Dentists
          • 6 Digit Code(s) NAICS 621210: Offices of Dentists
      • Industry Group 6213: Offices of Other Health Practitioners
        • Industry 62131: Offices of Chiropractors
          • 6 Digit Code(s) NAICS 621310: Offices of Chiropractors
        • Industry 62132: Offices of Optometrists
          • 6 Digit Code(s) NAICS 621320: Offices of Optometrists
        • Industry 62133: Offices of Mental Health Practitioners (except Physicians)
          • 6 Digit Code(s) NAICS 621330: Offices of Mental Health Practitioners (except Physicians)
        • Industry 62134: Offices of Physical, Occupational and Speech Therapists, and Audiologists
          • 6 Digit Code(s) NAICS 621340: Offices of Physical, Occupational and Speech Therapists, and Audiologists
        • Industry 62139: Offices of All Other Health Practitioners
          • 6 Digit Code(s) NAICS 621391: Offices of Podiatrists
          • 6 Digit Code(s) NAICS 621399: Offices of All Other Miscellaneous Health Practitioners
      • Industry Group 6214: Outpatient Care Centers
        • Industry 62141: Family Planning Centers
          • 6 Digit Code(s) NAICS 621410: Family Planning Centers
        • Industry 62142: Outpatient Mental Health and Substance Abuse Centers
          • 6 Digit Code(s) NAICS 621420: Outpatient Mental Health and Substance Abuse Centers
        • Industry 62149: Other Outpatient Care Centers
          • 6 Digit Code(s) NAICS 621491: HMO Medical Centers
          • 6 Digit Code(s) NAICS 621492: Kidney Dialysis Centers
          • 6 Digit Code(s) NAICS 621493: Freestanding Ambulatory Surgical and Emergency Centers
          • 6 Digit Code(s) NAICS 621498: All Other Outpatient Care Centers
      • Industry Group 6215: Medical and Diagnostic Laboratories
        • Industry 62151: Medical and Diagnostic Laboratories
          • 6 Digit Code(s) NAICS 621511: Medical Laboratories
          • 6 Digit Code(s) NAICS 621512: Diagnostic Imaging Centers
      • Industry Group 6216: Home Health Care Services
        • Industry 62161: Home Health Care Services
          • 6 Digit Code(s) NAICS 621610: Home Health Care Services
      • Industry Group 6219: Other Ambulatory Health Care Services
        • Industry 62191: Ambulance Services
          • 6 Digit Code(s) NAICS 621910: Ambulance Services
        • Industry 62199: All Other Ambulatory Health Care Services
          • 6 Digit Code(s) NAICS 621991: Blood and Organ Banks
          • 6 Digit Code(s) NAICS 621999: All Other Miscellaneous Ambulatory Health Care Services

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NAICS 3 Digit Subsector Code 621