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.
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
| NAICS Code | 621512 |
|---|---|
| Industry Title | Diagnostic Imaging Centers |
| SBA Size Standard | $19,000,000 |
| U.S. Establishments | 6,968 (Census CBP, 2023) |
| IRS PBA Code | 621510 (rolled-up match) |
| Sectors Hierarchy | Sector 62 → 621 → 6215 |
| Source / Verified | US Census 2022 NAICS Manual, Census CBP / 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 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)
Related Resources & Compliance Guides
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.
- 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 6215
Frequently Asked Questions (FAQ)
Is 621512 a valid 2022 NAICS code?
NAICS 621512 is 'Diagnostic Imaging Centers', a 2022 U.S. national industry under Sector 62 (Health Care and Social Assistance); the SBA small-business size standard is $19,000,000.
What is the SBA size standard for NAICS 621512?
The SBA small business size standard for NAICS 621512 is $19,000,000 (based on receipts).
What is the legacy SIC code mapping for 621512?
NAICS code 621512 maps to the legacy 1987 SIC codes: 8071 - Medical Laboratories.