Physician Assistants & Advanced Practice Nursing Providers / 364SE0003X
Individual · specialization · Medicare specialty 89
364SE0003X Emergency Clinical Nurse Specialist
364SE0003X is the taxonomy code for Emergency, a specialization of Clinical Nurse Specialist, 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 89, Certified Clinical Nurse Specialist, under which 2,230 practitioners are enrolled.
- 1Taxonomy code 364SE0003X
- 2Level Specialization
- 3Medicare specialty 89 Certified Clinical Nurse Specialist
- 4Codes in this group 58
Definition
NUCC publishes no definition for 364SE0003X; the code is identified by its place in the tree below.
Where 364SE0003X sits
- Group: Physician Assistants & Advanced Practice Nursing Providers — code 9 of 58 in the group
- Classification: Clinical Nurse Specialist 364S00000X
- Specialization: Emergency 364SE0003X
Choose 364SE0003X over the general Clinical Nurse Specialist code (364S00000X) when the provider's training or certification is specifically in emergency; 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 364SE0003X to Medicare specialty 89 (Certified Clinical Nurse Specialist). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 2,230 practitioners are enrolled under it nationally, and 33 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 364S00000X Clinical Nurse Specialist; 364SA2100X Acute Care Clinical Nurse Specialist; 364SA2200X Adult Health Clinical Nurse Specialist; 364SC0200X Critical Care Medicine Clinical Nurse Specialist; 364SC1501X Community Health/Public Health Clinical Nurse Specialist; 364SC2300X Chronic Care Clinical Nurse Specialist; 364SE1400X Ethics Clinical Nurse Specialist; 364SF0001X Family Health Clinical Nurse Specialist; and 25 more.
Related codes
| Code | Clinical Nurse Specialist — other specializations |
|---|---|
| 364SC2300X | Chronic Care |
| 364SC1501X | Community Health/Public Health |
| 364SC0200X | Critical Care Medicine |
| 364SE1400X | Ethics |
| 364SF0001X | Family Health |
| 364SG0600X | Gerontology |
The nearest 6 of 33 other codes under Clinical Nurse Specialist; all are on the group page.
History of 364SE0003X
NUCC's notes record no dated changes for 364SE0003X. 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 364SE0003X 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:
- 207P00000X Emergency Medicine Physician (Allopathic & Osteopathic Physicians)
- 207PE0004X Emergency Medical Services (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians)
- 207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician (Allopathic & Osteopathic Physicians)
- 2080P0204X Pediatric Emergency Medicine (Pediatrics) Physician (Allopathic & Osteopathic Physicians)
- 146N00000X Basic Emergency Medical Technician (Emergency Medical Service Providers)
- 146M00000X Intermediate Emergency Medical Technician (Emergency Medical Service Providers)
Find providers with 364SE0003X
Using 364SE0003X
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.