NUCC taxonomy code

207UN0903X - In Vivo & In Vitro Nuclear Medicine Physician

207UN0903X is the NUCC provider taxonomy code for In Vivo & In Vitro Nuclear Medicine Physician, a specialization within Nuclear Medicine (individual providers). 22 providers in our latest NPPES snapshot list it as their primary taxonomy.

22 providers · primary taxonomy

Code breakdown

Taxonomy code 207UN0903X

Display name In Vivo & In Vitro Nuclear Medicine Physician

Grouping Allopathic & Osteopathic Physicians

Classification Nuclear Medicine

Specialization In Vivo & In Vitro Nuclear Medicine

Section Individual

Directory Nuclear Medicine provider directory

Definition

A nuclear medicine physician who specializes in in vivo and in vitro nuclear medicine.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

207U00000X Nuclear Medicine Physician 207UN0901X Nuclear Cardiology Physician (Nuclear Medicine) 207UN0902X Nuclear Imaging & Therapy Physician (Nuclear Medicine) 207K00000X Allergy & Immunology Physician 207KA0200X Allergy Physician (Allergy & Immunology) 207KI0005X Clinical & Laboratory Immunology (Allergy & Immunology) Physician (Allergy & Immunology) 207L00000X Anesthesiology Physician 207LA0401X Addiction Medicine (Anesthesiology) Physician (Anesthesiology)

Frequently asked questions

What does taxonomy code 207UN0903X mean?

207UN0903X is the NUCC Health Care Provider Taxonomy code for In Vivo & In Vitro Nuclear Medicine Physician, a specialization of Nuclear 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 207UN0903X?

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

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