Allopathic & Osteopathic Physicians / 2085R0205X
Individual · specialization · Medicare specialty 30
2085R0205X Radiological Physics Physician
2085R0205X is the taxonomy code for Radiological Physics, a specialization of Radiology, in the NUCC group “Allopathic & Osteopathic Physicians”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 30, Physician/Diagnostic Radiology, under which 38,230 practitioners are enrolled.
- 1Taxonomy code 2085R0205X
- 2Level Specialization
- 3Medicare specialty 30 Physician/Diagnostic Radiology
- 4Codes in this group 238
Definition
A radiological physicist deals with the diagnostic and therapeutic applications of roentgen rays, gamma rays from sealed sources, ultrasonic radiation and radio-frequency radiation, as well as the equipment associated with their production and use, including radiation safety.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 2085R0205X sits
- Group: Allopathic & Osteopathic Physicians — code 221 of 238 in the group
- Classification: Radiology
- Specialization: Radiological Physics 2085R0205X
Choose 2085R0205X over the general Radiology code when the provider's training or certification is specifically in radiological physics; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 2085R0205X to Medicare specialty 30 (Physician/Diagnostic Radiology). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 38,230 practitioners are enrolled under it nationally, and 4 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 2085D0003X Diagnostic Neuroimaging (Radiology) Physician; 2085P0229X Pediatric Radiology Physician; 2085R0202X Diagnostic Radiology Physician; 2085U0001X Diagnostic Ultrasound Physician.
Related codes
| Code | Radiology — other specializations |
|---|---|
| 2085N0904X | Nuclear Radiology |
| 2085P0229X | Pediatric Radiology |
| 2085R0001X | Radiation Oncology |
| 2085R0203X | Therapeutic Radiology |
| 2085R0204X | Vascular & Interventional Radiology |
The nearest 5 of 11 other codes under Radiology; all are on the group page.
History of 2085R0205X
NUCC's earliest recorded change to 2085R0205X is from 2007 (definition added, source added).
- 2007-07-01 — definition added, source added
Find providers with 2085R0205X
Using 2085R0205X
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); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.