Physician Assistants & Advanced Practice Nursing Providers / 363AS0400X
Individual · specialization · Medicare specialty 97
363AS0400X Surgical Physician Assistant
363AS0400X is the taxonomy code for Surgical, a specialization of 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 363AS0400X
- 2Level Specialization
- 3Medicare specialty 97 Physician Assistant
- 4Codes in this group 58
Definition
NUCC publishes no definition for 363AS0400X; the code is identified by its place in the tree below.
Where 363AS0400X sits
- Group: Physician Assistants & Advanced Practice Nursing Providers — code 58 of 58 in the group
- Classification: Physician Assistant 363A00000X
- Specialization: Surgical 363AS0400X
Choose 363AS0400X over the general Physician Assistant code (363A00000X) when the provider's training or certification is specifically in surgical; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 363AS0400X 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: 363A00000X Physician Assistant; 363AM0700X Medical Physician Assistant.
Related codes
| Code | Physician Assistant — other specializations |
|---|---|
| 363A00000X | Physician Assistant |
| 363AM0700X | Medical |
History of 363AS0400X
NUCC's notes record no dated changes for 363AS0400X. 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 363AS0400X 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:
- 2086S0102X Surgical Critical Care Physician (Allopathic & Osteopathic Physicians)
- 2086X0206X Surgical Oncology Physician (Allopathic & Osteopathic Physicians)
- 163WM0705X Medical-Surgical Registered Nurse (Nursing Service Providers)
- 246ZC0007X Surgical Assistant (Technologists, Technicians & Other Technical Service Providers)
- 246ZS0410X Surgical Technologist (Technologists, Technicians & Other Technical Service Providers)
- 261QA1903X Ambulatory Surgical Clinic/Center (Ambulatory Health Care Facilities)
Find providers with 363AS0400X
Using 363AS0400X
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.