2022 NAICS national industry in sector 62 Health Care and Social Assistance
621512 Diagnostic Imaging Centers
NAICS 621512 is the US industry code for diagnostic imaging centers. This U.S.
- Code
- 621512 (2022 NAICS)
- Title
- Diagnostic Imaging Centers
- Part of
- Medical and Diagnostic Laboratories
- SBA small business limit
- Average annual receipts up to $19 million
- Closest UK SIC
- 86900 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
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.
Examples Census gives
- Computer tomography (CT-scan) centers
- Medical radiological laboratories
- Dental or medical X-ray laboratories
- Ultrasound imaging centers
- Magnetic resonance imaging (MRI) centers
Activities listed under 621512
The Census index assigns these 22 activities to this code. If your business matches one, this is your code.
- CAT (computerized axial tomography) scanner centers
- Computer tomography (CT-SCAN) centers
- CT-SCAN (computer tomography) centers
- Dental X-ray laboratories
- Diagnostic imaging centers (medical)
- Laboratories, dental X-ray
- Laboratories, medical radiological or X-ray
- Laboratory testing services, medical radiological or X-ray
- Magnetic resonance imaging (MRI) centers
- Mammogram (i.e., breast imaging) centers
- Medical laboratories, radiological or X-ray
- Medical radiological laboratories
- Medical X-ray laboratories
- Mobile breast imaging centers
- Mobile X-ray facilities (medical)
- MRI (magnetic resonance imaging) centers
- Positron emission tomography (PET) scanner centers
- Radiological laboratories, medical
- Radiological laboratory services, medical
- Single photon emission computerized tomography (SPECT) centers
- Ultrasound imaging centers
- X-ray laboratories, medical or dental
SBA size standard for 621512
To count as a small business for SBA loans and federal contracts under NAICS 621512, your business (including affiliates) must not exceed $19 million in average annual receipts. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 8690), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.