Internal Medicine Physician: NPI taxonomy code 207R00000X
Taxonomy code 207R00000X is Internal Medicine, in the Allopathic & Osteopathic Physicians group.
191,739 active NPIs list it as their primary specialty (2.0% of all).
| Code | 207R00000X |
|---|---|
| Group | Allopathic & Osteopathic Physicians |
| Classification | Internal Medicine |
| Used for | individual providers (the code is in NUCC's Individual section) |
| Active NPIs, primary specialty | 191,739 (149,850 individuals, 41,889 organizations) |
What NUCC says: A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. (excerpt of the NUCC 26.1 definition)
Find Internal Medicine Physician providers
Search the registry for providers listing Internal Medicine. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| California | 22,046 | 11.5% |
| New York | 15,548 | 8.1% |
| Florida | 15,306 | 8.0% |
| Texas | 12,510 | 6.5% |
| Pennsylvania | 9,072 | 4.7% |
| Illinois | 9,024 | 4.7% |
| Michigan | 7,712 | 4.0% |
| Massachusetts | 7,625 | 4.0% |
| New Jersey | 6,678 | 3.5% |
| Ohio | 6,472 | 3.4% |
Top states by practice location, from the NPPES file of September 13, 2026.
Related specialties
- Cardiovascular Disease Physician 36,469
- Gastroenterology Physician 26,237
- Pulmonary Disease Physician 19,774
- Hematology & Oncology Physician 17,624
- Nephrology Physician 17,596
- Infectious Disease Physician 13,258
- Endocrinology, Diabetes & Metabolism Physician 13,019
- Rheumatology Physician 10,232
Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.