Allopathic & Osteopathic Physicians / 207L00000X
Individual · classification · Medicare specialty 05
207L00000X Anesthesiology Physician
207L00000X is the taxonomy code for Anesthesiology, in the NUCC group “Allopathic & Osteopathic Physicians”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 05, Physician/Anesthesiology, under which 50,626 practitioners are enrolled, and to 1 other specialty listed below.
- 1Taxonomy code 207L00000X
- 2Level Classification
- 3Medicare specialty 05 Physician/Anesthesiology
- 4Codes in this group 238
Definition
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.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207L00000X sits
- Group: Allopathic & Osteopathic Physicians — code 4 of 238 in the group
- Classification: Anesthesiology 207L00000X
This is the general code for Anesthesiology. 6 more specific codes sit beneath it; pick one of those when the provider's training or certification matches it, and this one otherwise. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 207L00000X to Medicare specialty 05 (Physician/Anesthesiology) and Medicare specialty 79 (Physician/Addiction Medicine). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 50,626 practitioners are enrolled under it nationally, and 8 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207LA0401X Addiction Medicine (Anesthesiology) Physician; 207LC0200X Critical Care Medicine (Anesthesiology) Physician; 207LH0002X Hospice and Palliative Medicine (Anesthesiology) Physician; 207LP2900X Pain Medicine (Anesthesiology) Physician; 207LP3000X Pediatric Anesthesiology Physician; 207QA0401X Addiction Medicine (Family Medicine) Physician; 207RA0401X Addiction Medicine (Internal Medicine) Physician; 2084A0401X Addiction Medicine (Psychiatry & Neurology) Physician.
Related codes
| Code | Anesthesiology — specializations |
|---|---|
| 207LA0401X | Addiction Medicine |
| 207LC0200X | Critical Care Medicine |
| 207LH0002X | Hospice and Palliative Medicine |
| 207LP2900X | Pain Medicine |
| 207LP3000X | Pediatric Anesthesiology |
| 207LP4000X | Physician Nutrition Specialist |
History of 207L00000X
NUCC's earliest recorded change to 207L00000X is from 2007 (added definition, added source), and has been revised 1 time since.
- 2007-07-01 — added definition, added source
- 2011-07-01 — modified source
Similar codes in other groups
If 207L00000X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 1223D0004X Dental Anesthesiology (Dental Providers)
Find providers with 207L00000X
Using 207L00000X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.