Anesthesiology Physician
72,200 active US providers register Anesthesiology Physician as their primary taxonomy. That is 0.8% of every provider in the registry, and the 37th largest of 584 specialties with a page here.
- Taxonomy code
- 207L00000X
- Grouping
- Allopathic & Osteopathic Physicians
- Classification
- Anesthesiology
- Active providers
- 72,200
- States covered
- 51 of 51
What the code means
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
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 | 9,515 | |
| Texas | 6,088 | |
| New York | 5,805 | |
| Florida | 4,413 | |
| Illinois | 2,918 | |
| Pennsylvania | 2,791 | |
| Ohio | 2,283 | |
| Massachusetts | 2,205 | |
| New Jersey | 2,129 | |
| Arizona | 2,113 | |
| Michigan | 1,966 | |
| Washington | 1,868 | |
| Georgia | 1,722 | |
| Maryland | 1,670 | |
| Indiana | 1,636 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
60,378 of these are people and 11,822 are organisations, so 16% of the code is businesses rather than clinicians. Half of them had registered by 2007, and 6,045 registered in the last five years, 8% 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.
- DALLAS, TX1,660
- NEW YORK, NY1,546
- HOUSTON, TX1,315
- CHICAGO, IL1,195
- BOSTON, MA1,091
- LOS ANGELES, CA900
- PHOENIX, AZ861
- SAN DIEGO, CA721
- SEATTLE, WA711
- PHILADELPHIA, PA670
What else they list
Providers whose primary code is Anesthesiology 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 |
|---|---|---|
| Student in an Organized Health Care Education/Training Program | 6,062 | 8.4% |
| Pain Medicine (Anesthesiology) Physician | 3,135 | 4.3% |
| Certified Registered Nurse Anesthetist | 1,539 | 2.1% |
| Critical Care Medicine (Anesthesiology) Physician | 1,407 | 1.9% |
| Pediatric Anesthesiology Physician | 1,117 | 1.5% |
| Internal Medicine Physician | 833 | 1.2% |
| Interventional Pain Medicine Physician | 610 | 0.8% |
| Specialist | 553 | 0.8% |
Nearby specialties
Other taxonomies NUCC files under Anesthesiology.
- Pain Medicine (Anesthesiology) Physician8,050
- Pediatric Anesthesiology Physician2,078
- Critical Care Medicine (Anesthesiology) Physician1,425
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.