621111 — Offices of Physicians (except Mental Health Specialists)
Description
This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Doctor of Medicine) or D.O. (Doctor of Osteopathic Medicine) primarily engaged in the independent practice of general or specialized medicine (except psychiatry or psychoanalysis) or surgery. 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.
Overview Facts
| NAICS Code | 621111 |
|---|---|
| Industry Title | Offices of Physicians (except Mental Health Specialists) |
| SBA Size Standard | $16,000,000 |
| IRS PBA Code | 621111 (exact match) |
| Sectors Hierarchy | Sector 62 → 621 → 6211 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 8011 - Offices and Clinics of Doctors of Medicine (via SIC1987:8011→NAICS1997:621111→2002:621111→2007:621111→2012:621111→2017:621111→2022:621111)
- SIC 8031 - Offices and Clinics of Doctors of Osteopathy (via SIC1987:8031→NAICS1997:621111→2002:621111→2007:621111→2012:621111→2017:621111→2022:621111)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 621111:
- 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.
- 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.
Related Industries in 6211
Frequently Asked Questions (FAQ)
Is 621111 a valid 2022 NAICS code?
NAICS 621111 is 'Offices of Physicians (except Mental Health Specialists)', a 2022 U.S. national industry under Sector 62 (Health Care and Social Assistance); the SBA small-business size standard is $16,000,000.
What is the SBA size standard for NAICS 621111?
The SBA small business size standard for NAICS 621111 is $16,000,000 (based on receipts).
What is the legacy SIC code mapping for 621111?
NAICS code 621111 maps to the legacy 1987 SIC codes: 8011 - Offices and Clinics of Doctors of Medicine, 8031 - Offices and Clinics of Doctors of Osteopathy.