Physician Assistants & Advanced Practice Nursing Providers / 363A00000X
Individual · classification · Medicare specialty 97
363A00000X Physician Assistant
363A00000X is the taxonomy code for Physician Assistant, in the NUCC group “Physician Assistants & Advanced Practice Nursing Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 97, Physician Assistant, under which 173,353 practitioners are enrolled.
- 1Taxonomy code 363A00000X
- 2Level Classification
- 3Medicare specialty 97 Physician Assistant
- 4Codes in this group 58
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 363A00000X sits
- Group: Physician Assistants & Advanced Practice Nursing Providers — code 56 of 58 in the group
- Classification: Physician Assistant 363A00000X
This is the general code for Physician Assistant. 2 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 363A00000X to Medicare specialty 97 (Physician Assistant). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 173,353 practitioners are enrolled under it nationally, and 2 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 363AM0700X Medical Physician Assistant; 363AS0400X Surgical Physician Assistant.
Related codes
| Code | Physician Assistant — specializations |
|---|---|
| 363AM0700X | Medical |
| 363AS0400X | Surgical |
History of 363A00000X
NUCC's notes record no dated changes for 363A00000X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Similar codes in other groups
If 363A00000X 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:
- 207LP4000X Physician Nutrition Specialist (Anesthesiology) (Allopathic & Osteopathic Physicians)
- 207QP0002X Physician Nutrition Specialist (Family Medicine) (Allopathic & Osteopathic Physicians)
- 207RP1002X Physician Nutrition Specialist (Internal Medicine) (Allopathic & Osteopathic Physicians)
- 2080P1004X Physician Nutrition Specialist (Pediatrics) (Allopathic & Osteopathic Physicians)
- 2086P0122X Physician Nutrition Specialist (Surgery) (Allopathic & Osteopathic Physicians)
- 106E00000X Assistant Behavior Analyst (Behavioral Health & Social Service Providers)
Find providers with 363A00000X
Using 363A00000X
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.