Allopathic & Osteopathic Physicians / 207U00000X
Individual · classification · Medicare specialty 36
207U00000X Nuclear Medicine Physician
207U00000X is the taxonomy code for Nuclear Medicine, 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 36, Physician/Nuclear Medicine, under which 738 practitioners are enrolled.
- 1Taxonomy code 207U00000X
- 2Level Classification
- 3Medicare specialty 36 Physician/Nuclear Medicine
- 4Codes in this group 238
Definition
A nuclear medicine specialist employs the properties of radioactive atoms and molecules in the diagnosis and treatment of disease and in research. Radiation detection and imaging instrument systems are used to detect disease as it changes the function and metabolism of normal cells, tissues and organs. A wide variety of diseases can be found in this way, usually before the structure of the organ involved by the disease can be seen to be abnormal by any other techniques. Early detection of coronary artery disease (including acute heart attack), early cancer detection and evaluation of the effect of tumor treatment, diagnosis of infection and inflammation anywhere in the body and early detection of blood clot in the lungs are all possible with these techniques. Unique forms of radioactive molecules can attack and kill cancer cells (e.g., lymphoma, thyroid cancer) or can relieve the severe pain of cancer that has spread to bone
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207U00000X sits
- Group: Allopathic & Osteopathic Physicians — code 84 of 238 in the group
- Classification: Nuclear Medicine 207U00000X
This is the general code for Nuclear Medicine. 3 more specific codes sit beneath it; pick one of those when the provider's training or certification matches it, and this one otherwise. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 207U00000X to Medicare specialty 36 (Physician/Nuclear Medicine). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 738 practitioners are enrolled under it nationally, and 4 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207UN0901X Nuclear Cardiology Physician; 207UN0902X Nuclear Imaging & Therapy Physician; 207UN0903X In Vivo & In Vitro Nuclear Medicine Physician; 2085N0904X Nuclear Radiology Physician.
Related codes
| Code | Nuclear Medicine — specializations |
|---|---|
| 207UN0903X | In Vivo & In Vitro Nuclear Medicine |
| 207UN0901X | Nuclear Cardiology |
| 207UN0902X | Nuclear Imaging & Therapy |
History of 207U00000X
NUCC's earliest recorded change to 207U00000X is from 2007 (definition added, source added), and has been revised 1 time since.
- 2007-07-01 — definition added, source added
- 2011-07-01 — modified source
Similar codes in other groups
If 207U00000X 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:
- 125Q00000X Oral Medicine Dentistry (Dental Providers)
- 163WC0200X Critical Care Medicine Registered Nurse (Nursing Service Providers)
- 173000000X Legal Medicine (Other Service Providers)
- 1835E0208X Emergency Medicine Pharmacist (Pharmacy Service Providers)
- 1835N0905X Nuclear Pharmacist (Pharmacy Service Providers)
- 364SC0200X Critical Care Medicine Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)
Find providers with 207U00000X
Using 207U00000X
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.