621399 — Offices of All Other Miscellaneous Health Practitioners
Description
This U.S. industry comprises establishments of independent health practitioners (except physicians; dentists; chiropractors; optometrists; mental health specialists; physical, occupational, and speech therapists; audiologists; and podiatrists). These practitioners operate private or group practices in their own offices (e.g., centers, clinics) or in the facilities of others, such as hospitals or HMO medical centers (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Acupuncturists' (except MDs or DOs) offices
- Hypnotherapists' offices
- Dental hygienists' offices
- Inhalation or respiratory therapists' offices
- Denturists' offices
- Midwives' offices
- Dietitians' offices
- Naturopaths' offices
- Homeopaths' offices
- Registered or licensed practical nurses' offices
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 8049 - Offices and Clinics of Health Practitioners, NEC (via SIC1987:8049→NAICS1997:621399→2002:621399→2007:621399→2012:621399→2017:621399→2022:621399)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC Q999 — Other Medical Services
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 621399 valid in 2022? ▾
Yes, 621399 is a valid 6-digit 2022 NAICS national industry code representing 'Offices of All Other Miscellaneous Health Practitioners' under Sector 62 in the official classification index.
What is the SBA size standard for NAICS code 621399? ▾
The Small Business Administration (SBA) has established a small business size standard of $10,000,000 for NAICS code 621399 (Offices of All Other Miscellaneous Health Practitioners), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 621399? ▾
According to official Census Bureau concordance tables, NAICS code 621399 (Offices of All Other Miscellaneous Health Practitioners) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 8049 - Offices and Clinics of Health Practitioners, NEC.
Related Pages & Tools
Further regulatory reference links for NAICS code 621399:
- Sector 62 Directory Hub — List of related industries in the Health Care and Social Assistance sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 621399 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Offices of All Other Miscellaneous Health Practitioners).
- IRS PBA Code for Acupuncture — Principal Business Activity tax reporting details.
- Compare NAICS 621210 vs 621399 — Industrial classification comparison rules (Offices of All Other Miscellaneous Health Practitioners vs Offices of Dentists).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.