621512 — Diagnostic Imaging Centers
Description
This U.S. industry comprises establishments known as diagnostic imaging centers primarily engaged in producing images of the patient generally on referral from a health practitioner (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Computer tomography (CT-scan) centers
- Medical radiological laboratories
- Dental or medical X-ray laboratories
- Ultrasound imaging centers
- Magnetic resonance imaging (MRI) centers
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 8071 - Medical Laboratories (via SIC1987:8071→NAICS1997:621512→2002:621512→2007:621512→2012:621512→2017:621512→2022:621512)
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 Q701 — Specialized Medical Support
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 621512 valid in 2022? ▾
Yes, 621512 is a valid 6-digit 2022 NAICS national industry code representing 'Diagnostic Imaging Centers' under Sector 62 in the official classification index.
What is the SBA size standard for NAICS code 621512? ▾
The Small Business Administration (SBA) has established a small business size standard of $19,000,000 for NAICS code 621512 (Diagnostic Imaging Centers), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 621512? ▾
According to official Census Bureau concordance tables, NAICS code 621512 (Diagnostic Imaging Centers) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 8071 - Medical Laboratories.
Related Pages & Tools
Further regulatory reference links for NAICS code 621512:
- 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 621512 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Diagnostic Imaging Centers).
- 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.