NAICS 621512:
Diagnostic Imaging Centers
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.
Computer tomography (CT-scan) centersMedical radiological laboratoriesDental or medical X-ray laboratories+2 examples
Ultrasound imaging centersMagnetic resonance imaging (MRI) centers
Matching SIC code: 8071 Medical Laboratories
Where it sits
- 62Health Care and Social AssistanceSector
- 621Ambulatory Health Care ServicesSubsector
- 6215Medical and Diagnostic LaboratoriesIndustry group
- 62151Medical and Diagnostic LaboratoriesNAICS industry
- 621512Diagnostic Imaging CentersNational industry
Largest companies with NAICS 621512
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  RadNetradnet.com | Los Angeles, US | 5.9K |
| 2 |  RAYUS Radiologyrayusradiology.com | US | 2K |
| 3 |  SimonMedsimonmed.com | Scottsdale, US | 1.6K |
| 4 |  Akumin®akumin.com | Tampa, US | 1.3K |
| 5 |  TridentCaretridentcare.com | Sparks, US | 1.1K |
| 6 |  Solis Mammographysolismammo.com | Addison, US | 824 |
| 7 |  Radiology Ltd.radltd.com | Tucson, US | 694 |
| 8 |  Shields Healthshields.com | Quincy, US | 674 |
| 9 |  Fairfax Radiology Centersfairfaxradiology.com | Fairfax, US | 626 |
| 10 |  Zwanger-Pesiri Radiologyzprad.com | Lindenhurst, US | 611 |
Questions about NAICS 621512
Which businesses use NAICS 621512?
Computer tomography (CT-scan) centers, medical radiological laboratories and dental or medical X-ray laboratories, and similar businesses in the Health Care and Social Assistance sector. This U.S.
What SIC code matches NAICS 621512?
SIC 8071, Medical Laboratories, from the US Census Bureau's concordance between the two systems.
How many companies have NAICS 621512?
3,871 companies with a website carry NAICS 621512 as their primary code in Crustdata's data, worldwide.
Find any company's NAICS codeType a company name or website and get its codes with their titles.
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Sign up freeCode titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.