Medical Oncology Physician
6,375 active US providers register Medical Oncology Physician as their primary taxonomy. That is 0.07% of every provider in the registry, and the 171st largest of 584 specialties with a page here.
- Taxonomy code
- 207RX0202X
- Grouping
- Allopathic & Osteopathic Physicians
- Classification
- Internal Medicine
- Specialization
- Medical Oncology
- Active providers
- 6,375
- States covered
- 51 of 51
What the code means
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Definition quoted verbatim from the NUCC Health Care Provider Taxonomy code set, version 25.1. Not paraphrased.
Where they are
Counted by practice location, not by mailing address or by licence state. A provider practising across a state line is counted where they practise.
| State | Providers | Share |
|---|---|---|
| Florida | 645 | |
| New York | 590 | |
| Texas | 583 | |
| California | 475 | |
| Massachusetts | 416 | |
| Pennsylvania | 304 | |
| Maryland | 245 | |
| North Carolina | 225 | |
| Michigan | 200 | |
| Ohio | 195 | |
| Illinois | 195 | |
| Washington | 188 | |
| Missouri | 165 | |
| Minnesota | 161 | |
| New Jersey | 153 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
5,780 of these are people and 595 are organisations, so 9% of the code is businesses rather than clinicians. Half of them had registered by 2007, and 219 registered in the last five years, 3% of the current population.
That is a slow-growing code, which usually means an established field replacing retirements rather than expanding.
Where the practices are
By practice-location city. City counts are noisier than state counts, because a large employer files one address for many providers.
- NEW YORK, NY382
- BOSTON, MA333
- HOUSTON, TX226
- PHILADELPHIA, PA165
- BALTIMORE, MD137
- SAINT LOUIS, MO111
- SEATTLE, WA97
- ROCHESTER, MN91
- CHICAGO, IL83
- STANFORD, CA81
What else they list
Providers whose primary code is Medical Oncology Physician most often carry these secondary taxonomies as well. This is the closest thing the registry has to a map of which specialties overlap in practice, and it is not published anywhere else.
| Also listed | Providers | Share |
|---|---|---|
| Internal Medicine Physician | 1,581 | 24.8% |
| Hematology & Oncology Physician | 1,483 | 23.3% |
| Hematology (Internal Medicine) Physician | 944 | 14.8% |
| Student in an Organized Health Care Education/Training Program | 335 | 5.3% |
| Specialist | 103 | 1.6% |
| Radiation Oncology Physician | 75 | 1.2% |
| Hospitalist Physician | 62 | 1.0% |
| Hospice and Palliative Medicine (Internal Medicine) Physician | 56 | 0.9% |
Nearby specialties
Other taxonomies NUCC files under Internal Medicine.
- Geriatric Medicine (Internal Medicine) Physician6,380
- Critical Care Medicine (Internal Medicine) Physician7,231
- Interventional Cardiology Physician8,478
- Clinical Cardiac Electrophysiology Physician4,004
- Hospice and Palliative Medicine (Internal Medicine) Physician3,261
- Rheumatology Physician10,191
Looking up a specific provider
These counts come from the monthly NPPES file. To check one provider, use their NPI: the lookup reads the live registry and shows whether the identifier is still active, which the monthly file cannot tell you about the last few weeks.
Counts from npidata_pfile_20050523-20260712.csv, built 2026-08-09. Primary taxonomy only, deactivated identifiers excluded.