Infectious Disease Physician
13,206 active US providers register Infectious Disease Physician as their primary taxonomy. That is 0.1% of every provider in the registry, and the 108th largest of 584 specialties with a page here.
- Taxonomy code
- 207RI0200X
- Grouping
- Allopathic & Osteopathic Physicians
- Classification
- Internal Medicine
- Specialization
- Infectious Disease
- Active providers
- 13,206
- States covered
- 51 of 51
What the code means
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Definition quoted verbatim from the NUCC Health Care Provider Taxonomy code set, version 25.1. Not paraphrased.
Where they are
Counted by practice location, not by mailing address or by licence state. A provider practising across a state line is counted where they practise.
| State | Providers | Share |
|---|---|---|
| California | 1,343 | |
| New York | 1,118 | |
| Florida | 1,105 | |
| Texas | 926 | |
| Pennsylvania | 657 | |
| Illinois | 524 | |
| Massachusetts | 506 | |
| New Jersey | 498 | |
| Maryland | 497 | |
| Georgia | 417 | |
| Ohio | 402 | |
| Michigan | 379 | |
| North Carolina | 335 | |
| Virginia | 297 | |
| Washington | 273 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
10,847 of these are people and 2,359 are organisations, so 18% of the code is businesses rather than clinicians. Half of them had registered by 2007, and 738 registered in the last five years, 6% of the current population.
That is a slow-growing code, which usually means an established field replacing retirements rather than expanding.
Where the practices are
By practice-location city. City counts are noisier than state counts, because a large employer files one address for many providers.
- NEW YORK, NY373
- BOSTON, MA287
- BALTIMORE, MD230
- CHICAGO, IL229
- ATLANTA, GA210
- PHILADELPHIA, PA203
- HOUSTON, TX200
- SEATTLE, WA168
- LOS ANGELES, CA164
- DALLAS, TX128
What else they list
Providers whose primary code is Infectious Disease Physician most often carry these secondary taxonomies as well. This is the closest thing the registry has to a map of which specialties overlap in practice, and it is not published anywhere else.
| Also listed | Providers | Share |
|---|---|---|
| Internal Medicine Physician | 3,283 | 24.9% |
| Student in an Organized Health Care Education/Training Program | 797 | 6.0% |
| Hospitalist Physician | 276 | 2.1% |
| Pediatrics Physician | 94 | 0.7% |
| Specialist | 84 | 0.6% |
| Family Medicine Physician | 56 | 0.4% |
| Critical Care Medicine (Internal Medicine) Physician | 53 | 0.4% |
| General Practice Physician | 42 | 0.3% |
Nearby specialties
Other taxonomies NUCC files under Internal Medicine.
- Endocrinology, Diabetes & Metabolism Physician12,930
- Rheumatology Physician10,191
- Hematology & Oncology Physician17,524
- Nephrology Physician17,538
- Interventional Cardiology Physician8,478
- Critical Care Medicine (Internal Medicine) Physician7,231
Looking up a specific provider
These counts come from the monthly NPPES file. To check one provider, use their NPI: the lookup reads the live registry and shows whether the identifier is still active, which the monthly file cannot tell you about the last few weeks.
Counts from npidata_pfile_20050523-20260712.csv, built 2026-08-09. Primary taxonomy only, deactivated identifiers excluded.