207R00000X
Internal Medicine Hematology & Oncology Taxonomy Code 207RH0003X
207RH0003X
Level III - Area of Specialization
23,651Registered providers
11Medicare specialty
25.1NUCC version
54States & territories
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Code Details for 207RH0003X
About Taxonomy Code 207RH0003X
The taxonomy code 207RH0003X identifies Internal Medicine Hematology & Oncology within the Allopathic & Osteopathic Physicians provider grouping. It is a Level III — Area of Specialization code, the most specific tier: it narrows the parent classification to a defined subspecialty.
NPI records show 23,651 registered providers whose primary or secondary taxonomy is this code. Of these, 4,669 (20%) are registered as organizations and 18,982 (80%) as individual providers. The states with the most internal medicine hematology & oncology providers are California (2,410), New York (1,726), Florida (1,562). For Medicare enrollment, it crosswalks to specialty code 11 (Physician/Internal Medicine).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
23,651Total providers
4,669Organizations 20%
18,982Individuals 80%
6,770Female
12,210Male
2Undisclosed
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-06-21T00:00:00.
View all 23,651 providersInternal Medicine Hematology & Oncology Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
All states (nationwide)
23,651
Alabama281Alaska35Arizona481Arkansas172California2,410Colorado404Connecticut284Delaware58District Of Columbia120Florida1,562Georgia624Guam9Hawaii71Idaho80Illinois938Indiana548Iowa190Kansas195Kentucky315Louisiana299Maine134Maryland568Massachusetts688Michigan604Minnesota466Mississippi105Missouri407Montana75Nebraska163Nevada160New Hampshire129New Jersey718New Mexico108New York1,726North Carolina873North Dakota67Ohio865Oklahoma200Oregon265Pennsylvania1,143Puerto Rico211Rhode Island128South Carolina341South Dakota55Tennessee623Texas1,446Utah155Vermont38Virgin Islands6Virginia535Washington639West Virginia123Wisconsin438Wyoming35
Frequently Asked Questions
207RH0003X questionsNPPES lists 23,651 registered providers with this taxonomy code (Internal Medicine Hematology & Oncology).
Both. About 20% of these providers are registered as organizations and 80% as individuals.
It crosswalks to Medicare specialty code 11 (Physician/Internal Medicine).
It is a Level III - Area of Specialization code in the NUCC Health Care Provider Taxonomy set. As an area of specialization, it falls under the Internal Medicine classification (parent code 207R00000X).
Use the "Providers by state" directory on this page to open the list of internal medicine hematology & oncology providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 25.1. Provider counts from NPPES. See nucc.org.
