Physician Assistants & Advanced Practice Nursing Providers / 363L00000X
Individual · classification · Medicare specialty 50
363L00000X Nurse Practitioner
363L00000X is the taxonomy code for Nurse Practitioner, 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 50, Nurse Practitioner, under which 365,671 practitioners are enrolled.
- 1Taxonomy code 363L00000X
- 2Level Classification
- 3Medicare specialty 50 Nurse Practitioner
- 4Codes in this group 58
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 363L00000X sits
- Group: Physician Assistants & Advanced Practice Nursing Providers — code 38 of 58 in the group
- Classification: Nurse Practitioner 363L00000X
This is the general code for Nurse Practitioner. 17 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 363L00000X to Medicare specialty 50 (Nurse Practitioner). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 365,671 practitioners are enrolled under it nationally, and 17 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 363LA2100X Acute Care Nurse Practitioner; 363LA2200X Adult Health Nurse Practitioner; 363LC0200X Critical Care Medicine Nurse Practitioner; 363LC1500X Community Health Nurse Practitioner; 363LF0000X Family Nurse Practitioner; 363LG0600X Gerontology Nurse Practitioner; 363LN0000X Neonatal Nurse Practitioner; 363LN0005X Critical Care Neonatal Nurse Practitioner; and 9 more.
Related codes
| Code | Nurse Practitioner — specializations |
|---|---|
| 363LA2100X | Acute Care |
| 363LA2200X | Adult Health |
| 363LC1500X | Community Health |
| 363LC0200X | Critical Care Medicine — Medicare 50 Nurse Practitioner |
| 363LF0000X | Family |
| 363LG0600X | Gerontology |
| 363LN0000X | Neonatal |
| 363LN0005X | Neonatal, Critical Care — Medicare 50 Nurse Practitioner |
| 363LX0001X | Obstetrics & Gynecology |
| 363LX0106X | Occupational Health |
| 363LP0200X | Pediatrics |
| 363LP0222X | Pediatrics, Critical Care — Medicare 50 Nurse Practitioner |
| 363LP1700X | Perinatal |
| 363LP2300X | Primary Care |
| 363LP0808X | Psychiatric/Mental Health |
| 363LS0200X | School |
| 363LW0102X | Women's Health |
History of 363L00000X
NUCC's notes record no dated changes for 363L00000X. 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 363L00000X 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:
- 164W00000X Licensed Practical Nurse (Nursing Service Providers)
- 164X00000X Licensed Vocational Nurse (Nursing Service Providers)
- 163W00000X Registered Nurse (Nursing Service Providers)
- 163WM1400X Nurse Massage Therapist (NMT) (Nursing Service Providers)
- 163WR0006X Registered Nurse First Assistant (Nursing Service Providers)
- 376K00000X Nurse's Aide (Nursing Service Related Providers)
Find providers with 363L00000X
Using 363L00000X
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.