Anesthesiologist Assistant
4,968 active US providers register Anesthesiologist Assistant as their primary taxonomy. That is 0.05% of every provider in the registry, and the 188th largest of 584 specialties with a page here.
- Taxonomy code
- 367H00000X
- Grouping
- Physician Assistants & Advanced Practice Nursing Providers
- Classification
- Anesthesiologist Assistant
- Active providers
- 4,968
- States covered
- 42 of 51
What the code means
An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.
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 |
|---|---|---|
| Georgia | 1,547 | |
| Florida | 957 | |
| Texas | 525 | |
| Ohio | 454 | |
| Missouri | 311 | |
| Wisconsin | 265 | |
| Colorado | 219 | |
| Indiana | 163 | |
| District of Columbia | 130 | |
| South Carolina | 74 | |
| New Mexico | 61 | |
| North Carolina | 56 | |
| Michigan | 42 | |
| Vermont | 27 | |
| Oklahoma | 25 |
Showing the 15 largest of 42 states with at least one.
Who registers under this code
4,901 of these are people and 67 are organisations, so 1% of the code is businesses rather than clinicians. Half of them had registered by 2018, and 1,909 registered in the last five years, 38% of the current population.
That is close to the pace of the registry as a whole.
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.
- ATLANTA, GA772
- HOUSTON, TX206
- SAINT LOUIS, MO174
- CLEVELAND, OH169
- WASHINGTON, DC130
- SAVANNAH, GA125
- DALLAS, TX108
- AURORA, CO106
- JACKSONVILLE, FL105
- TAMPA, FL104
What else they list
Providers whose primary code is Anesthesiologist Assistant 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 | 172 | 3.5% |
| Anesthesiology Physician | 77 | 1.5% |
| Physician Assistant | 69 | 1.4% |
| Certified Registered Nurse Anesthetist | 24 | 0.5% |
| Medical Physician Assistant | 17 | 0.3% |
| Pharmacist | 7 | 0.1% |
| Registered Nurse | 7 | 0.1% |
| Specialist | 7 | 0.1% |
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.