Allergy & Immunology (Internal Medicine) Physician: NPI taxonomy code 207RA0201X
Taxonomy code 207RA0201X is Internal Medicine: Allergy & Immunology, in the Allopathic & Osteopathic Physicians group.
741 active NPIs list it as their primary specialty (<0.1% of all).
| Code | 207RA0201X |
|---|---|
| Group | Allopathic & Osteopathic Physicians |
| Classification | Internal Medicine |
| Specialization | Allergy & Immunology |
| Used for | individual providers (the code is in NUCC's Individual section) |
| Active NPIs, primary specialty | 741 (591 individuals, 150 organizations) |
What NUCC says: An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. (excerpt of the NUCC 26.1 definition)
Find Allergy & Immunology (Internal Medicine) Physician providers
Search the registry for providers listing Allergy & Immunology. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| California | 106 | 14.3% |
| New York | 76 | 10.3% |
| Texas | 62 | 8.4% |
| Illinois | 35 | 4.7% |
| Maryland | 34 | 4.6% |
| Florida | 34 | 4.6% |
| Missouri | 30 | 4.0% |
| Pennsylvania | 29 | 3.9% |
| Massachusetts | 27 | 3.6% |
| Wisconsin | 23 | 3.1% |
Top states by practice location, from the NPPES file of September 13, 2026.
Related specialties
- Internal Medicine Physician 191,739
- 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
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.