Technologists, Technicians & Other Technical Service Providers / 243U00000X
Individual · classification
243U00000X Radiology Practitioner Assistant
243U00000X is the taxonomy code for Radiology Practitioner Assistant, in the NUCC group “Technologists, Technicians & Other Technical Service Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. It has no entry in the CMS Medicare taxonomy crosswalk.
- 1Taxonomy code 243U00000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 65
Definition
A Radiology Practitioner Assistant (RPA) is a health professional certified as a registered radiographer with the American Registry of Radiologic Technologists (ARRT) and, in addition, is credentialed to provide primary radiology health care with radiologist supervision. Radiology Practitioner Assistants are qualified by graduation from an educational program recognized by the Board of Directors of athe Certification Board for Radiology Practitioner Assistants (CBRPA) and certified by the CBRPA. Within the Radiologist/RPA relationship, Radiology Practitioner Assistants exercise autonomy in decision making in the role of a primary caregiver with regard to patient assessment, patient management and in providing a broad range of radiology diagnostic and interventional services. The clinical role of the Radiology Practitioner Assistant includes primary and specialty care in radiology practice settings in rural and urban areas.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 243U00000X sits
- Group: Technologists, Technicians & Other Technical Service Providers — code 16 of 65 in the group
- Classification: Radiology Practitioner Assistant 243U00000X
Radiology Practitioner Assistant has no specializations, so 243U00000X is the only code for it. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
243U00000X has no entry in the CMS Medicare Provider and Supplier Taxonomy Crosswalk. That usually means Medicare does not enroll this kind of provider under its own specialty — the provider can still hold an NPI and use this code on claims to other payers.
Related codes
No other codes share the classification Radiology Practitioner Assistant. The rest of Technologists, Technicians & Other Technical Service Providers is on the group page.
History of 243U00000X
243U00000X was added to the code set in 2008.
- 2008-07-01 — new
Similar codes in other groups
If 243U00000X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 2085R0202X Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians)
- 2085N0904X Nuclear Radiology Physician (Allopathic & Osteopathic Physicians)
- 2085P0229X Pediatric Radiology Physician (Allopathic & Osteopathic Physicians)
- 2085R0203X Therapeutic Radiology Physician (Allopathic & Osteopathic Physicians)
- 2085R0204X Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians)
- 106E00000X Assistant Behavior Analyst (Behavioral Health & Social Service Providers)
Find providers with 243U00000X
Using 243U00000X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV). Checked 2026-10-24. Methodology.