NUCC taxonomy code

207RH0003X - Hematology & Oncology Physician

207RH0003X is the NUCC provider taxonomy code for Hematology & Oncology Physician, a specialization within Internal Medicine (individual providers). 17,524 providers in our latest NPPES snapshot list it as their primary taxonomy.

17,524 providers · primary taxonomy

Code breakdown

Taxonomy code 207RH0003X

Display name Hematology & Oncology Physician

Grouping Allopathic & Osteopathic Physicians

Classification Internal Medicine

Specialization Hematology & Oncology

Section Individual

Directory Internal Medicine provider directory

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.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

207R00000X Internal Medicine Physician 207RA0401X Addiction Medicine (Internal Medicine) Physician (Internal Medicine) 207RA0000X Adolescent Medicine (Internal Medicine) Physician (Internal Medicine) 207RA0002X Adult Congenital Heart Disease Physician (Internal Medicine) 207RA0001X Advanced Heart Failure and Transplant Cardiology Physician (Internal Medicine) 207RA0201X Allergy & Immunology (Internal Medicine) Physician (Internal Medicine) 207RC0000X Cardiovascular Disease Physician (Internal Medicine) 207RI0001X Clinical & Laboratory Immunology (Internal Medicine) Physician (Internal Medicine)

Frequently asked questions

What does taxonomy code 207RH0003X mean?

207RH0003X is the NUCC Health Care Provider Taxonomy code for Hematology & Oncology Physician, a specialization of Internal Medicine in the "Allopathic & Osteopathic Physicians" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 207RH0003X?

Browse the Internal Medicine directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-13.