Nuclear Medicine (207U00000X — its own standalone specialty) and Nuclear Radiology (a Radiology subspecialty, 200+ nationally). "Nuclear Medicine Physician" returns zero results. A complete radiopharmaceutical or imaging-device call list requires both queries.
taxonomy_description=Nuclear+Medicine+Physician → 0 resultstaxonomy_description=Nuclear+Medicine → Memphis 7, Nashville 21, NYC 184, Vermont 3, Wyoming 5taxonomy_description=Nuclear+Radiology → 200+ nationally (a separate, larger population)Nuclear Medicine misses the Nuclear Radiology population entirely — and nationally, Nuclear Radiology (200+) is the larger of the two groups. These are distinct training paths with different board certifications, department affiliations, and sometimes different equipment procurement relationships.
| Market | Nuclear Medicine (207U00000X) | Notes |
|---|---|---|
| New York, NY | 184 | Complete — NYC nuclear medicine population |
| Los Angeles, CA | 86 | Complete city count |
| Chicago, IL | 77 | Complete |
| Houston, TX | 72 | Complete |
| Phoenix, AZ | 35 | Complete |
| Nashville, TN | 21 | Complete |
| Memphis, TN | 7 | 5 NPI-1, 2 NPI-2; sparse specialty city-level |
| Wyoming (statewide) | 5 | Complete — entire state |
| Vermont (statewide) | 3 | Complete — entire state |
Source: CMS NPI Registry API v2.1, queried June 13, 2026. No market hit the 200-record cap for Nuclear Medicine. Nuclear Radiology (separate query) returns 200+ nationally. Download: npi-counts-nuclear-medicine.json
| NUCC code | Taxonomy string (exact) | Description | National count |
|---|---|---|---|
| 207U00000X | Nuclear Medicine |
Standalone nuclear medicine specialty (non-radiology training path) | NYC 184, LA 86, Chicago 77 |
| 207UN0901X | Nuclear Medicine, Nuclear Cardiology |
Nuclear medicine subspecialty for cardiac imaging | 200+ nationally |
| 207UX0002X | Nuclear Medicine, Nuclear Imaging & Therapy |
Combined diagnostic + therapeutic nuclear medicine | 200+ nationally |
| 207UX0001X | Nuclear Medicine, In Vivo & In Vitro Nuclear Medicine |
Clinical laboratory nuclear medicine | 134 nationally |
| 2085N0700X | Nuclear Radiology |
Radiology-trained pathway into nuclear imaging (separate specialty) | 200+ nationally |
Query with taxonomy_description=Nuclear+Medicine. This captures the standalone specialty (207U00000X) and its sub-codes (Nuclear Cardiology, Nuclear Imaging & Therapy, In Vivo & In Vitro Nuclear Medicine) via prefix matching. Note that nuclear medicine technologists (2471N0900X) also prefix-match — filter by MD/M.D. credentials to isolate physicians.
https://npiregistry.cms.hhs.gov/api/?version=2.1
&taxonomy_description=Nuclear+Medicine
&city=Memphis&state=TN&limit=200Query with taxonomy_description=Nuclear+Radiology using the same geographic parameters. This is the radiology-trained pathway (2085N0700X), nationally 200+. These physicians are distinct from standalone nuclear medicine specialists and often enumerated under radiology department addresses.
Nuclear medicine technologists (CNMT, RT(N) credentials) appear in Nuclear Medicine query results via prefix matching. For a physician-only list, filter to MD, M.D., or DO credentials after pulling data. In the Memphis dataset, the non-physician records were identifiable by credential.
Nuclear medicine physicians practice exclusively in hospital nuclear medicine departments and large imaging centers. A city-name filter may miss physicians who bill under a facility address in an adjacent municipality. A 50-mile radius ZIP-based query in getdork captures the facility-based population more reliably.
The getdork physician search tool allows you to run both Nuclear Medicine and Nuclear Radiology queries and export each as a CRM-ready CSV. Merge and deduplicate in your CRM import to build the complete nuclear imaging call list.
| Market type | Suggested radius | Notes |
|---|---|---|
| Dense urban (NYC, LA, Chicago) | 20–35 miles | NYC returned 184; large academic medical center concentration |
| Mid-size metro (Memphis, Nashville) | 50 miles | Memphis: 7 city records; 50-mile radius captures adjacent hospital markets |
| Rural state (Wyoming, Vermont) | Statewide | Wyoming: 5 statewide, Vermont: 3 — statewide query is appropriate |
The getdork physician search allows you to run both Nuclear Medicine and Nuclear Radiology queries with ZIP-radius filtering. Pro users export to CRM-ready CSV for both pathways.
Search Nuclear Medicine by ZIP — free"Nuclear Medicine" (207U00000X) is a standalone specialty — physicians who trained in nuclear medicine as a primary specialty, outside radiology. "Nuclear Radiology" (2085N0700X) is a subspecialty within the Radiology taxonomy — radiologists who subspecialized in nuclear imaging. Nationally, Nuclear Radiology returns 200+; Nuclear Medicine returns a smaller population. Both populations are needed for a complete nuclear imaging call list.
The NPI registry uses NUCC taxonomy description strings — field names, not practitioner titles. There is no NUCC code with the descriptor "Nuclear Medicine Physician." The correct string is "Nuclear Medicine" (207U00000X). Confirmed live June 13, 2026: taxonomy_description=Nuclear+Medicine+Physician returns zero results.
Three codes confirmed in live data: 207U00000X (Nuclear Medicine base), 207UN0901X (Nuclear Cardiology — specialized in cardiac nuclear imaging), 2471N0900X (Radiologic Technologist, Nuclear Medicine Technology — not a physician). Nuclear Cardiology subspecialists (200+ nationally) specifically drive myocardial perfusion imaging and cardiac stress test protocols. Filter by MD/M.D. credentials to separate physicians from technologists in the result set.
Yes — nuclear medicine is genuinely rare as a standalone specialty. Of 7 Memphis records, only 2 had Nuclear Medicine as primary taxonomy; others included cardiologists with nuclear cardiology as secondary credential, a pediatric radiologist, and a nuclear medicine technologist. The full Memphis nuclear imaging picture requires adding a Nuclear Radiology query. Nuclear Radiology (200+ nationally) substantially exceeds the Nuclear Medicine standalone count in most markets.
Nuclear medicine physicians practice almost exclusively in hospital nuclear medicine departments and large academic imaging centers — not private offices. NPI practice addresses typically reflect a hospital or medical center. City-name filtering is less reliable than radius-based querying for this specialty. In rural territories (Wyoming: 5 statewide, Vermont: 3 statewide), a statewide query returns the complete population — manageable in a single export.
Nuclear medicine physicians are primary prescribers and users of radiopharmaceuticals — technetium-99m isotopes for bone, cardiac, renal, and thyroid scans; FDG-PET tracers for oncology and neurology; iodine-131 for thyroid cancer treatment; lutetium-177 DOTATATE for neuroendocrine tumors; and emerging theranostic agents. They also drive procurement of gamma cameras, SPECT/CT systems, PET/CT systems, and dose calibrators. Nuclear Cardiology subspecialists (207UN0901X) specifically drive myocardial perfusion imaging workflow and cardiac stress protocols.
taxonomy_description=Nuclear+Medicine. Nuclear Radiology contrast query: taxonomy_description=Nuclear+Radiology. Zero-return confirmed for: Nuclear+Medicine+Physician. "200+" = API 200-record cap hit. Raw JSON available above. Vermont returned 3 records — below any cap — confirming true statewide count.