Nursing Service Providers / 163W00000X
Individual · classification
163W00000X Registered Nurse
163W00000X is the taxonomy code for Registered Nurse, in the NUCC group “Nursing Service Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. It has no entry in the CMS Medicare taxonomy crosswalk.
- 1Taxonomy code 163W00000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 59
Definition
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 163W00000X sits
- Group: Nursing Service Providers — code 4 of 59 in the group
- Classification: Registered Nurse 163W00000X
This is the general code for Registered Nurse. 55 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
163W00000X has no entry in the CMS Medicare Provider and Supplier Taxonomy Crosswalk. That usually means Medicare does not enroll this kind of provider under its own specialty — the provider can still hold an NPI and use this code on claims to other payers.
Related codes
| Code | Registered Nurse — specializations |
|---|---|
| 163WA0400X | Addiction (Substance Use Disorder) |
| 163WA2000X | Administrator |
| 163WP2201X | Ambulatory Care |
| 163WC3500X | Cardiac Rehabilitation |
| 163WC0400X | Case Management |
| 163WC1400X | College Health |
| 163WC1500X | Community Health |
| 163WC2100X | Continence Care |
| 163WC1600X | Continuing Education/Staff Development |
| 163WC0200X | Critical Care Medicine |
| 163WD0400X | Diabetes Educator |
| 163WD1100X | Dialysis, Peritoneal |
| 163WE0003X | Emergency |
| 163WE0900X | Enterostomal Therapy |
| 163WF0300X | Flight |
| 163WG0100X | Gastroenterology |
| 163WG0000X | General Practice |
| 163WG0600X | Gerontology |
| 163WH0500X | Hemodialysis |
| 163WH0200X | Home Health |
| 163WH1000X | Hospice |
| 163WI0600X | Infection Control |
| 163WI0500X | Infusion Therapy |
| 163WL0100X | Lactation Consultant |
| 163WM0102X | Maternal Newborn |
| 163WM0705X | Medical-Surgical |
| 163WN0002X | Neonatal Intensive Care |
| 163WN0003X | Neonatal, Low-Risk |
| 163WN0300X | Nephrology |
| 163WN0800X | Neuroscience |
| 163WM1400X | Nurse Massage Therapist (NMT) |
| 163WN1003X | Nutrition Support |
| 163WX0002X | Obstetric, High-Risk |
| 163WX0003X | Obstetric, Inpatient |
| 163WX0106X | Occupational Health |
| 163WX0200X | Oncology |
| 163WX1100X | Ophthalmic |
| 163WX0800X | Orthopedic |
| 163WX1500X | Ostomy Care |
| 163WX0601X | Otorhinolaryngology & Head-Neck |
| 163WP0000X | Pain Management |
| 163WP0218X | Pediatric Oncology |
| 163WP0200X | Pediatrics |
| 163WP1700X | Perinatal |
| 163WS0121X | Plastic Surgery |
| 163WP0808X | Psychiatric/Mental Health |
| 163WP0809X | Psychiatric/Mental Health, Adult |
| 163WP0807X | Psychiatric/Mental Health, Child & Adolescent |
| 163WR0006X | Registered Nurse First Assistant |
| 163WR0400X | Rehabilitation |
| 163WR1000X | Reproductive Endocrinology/Infertility |
| 163WS0200X | School |
| 163WU0100X | Urology |
| 163WW0101X | Women's Health Care, Ambulatory |
| 163WW0000X | Wound Care |
History of 163W00000X
NUCC's notes record no dated changes for 163W00000X. 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 163W00000X 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:
- 136A00000X Registered Dietetic Technician (Dietary & Nutritional Service Providers)
- 133V00000X Registered Dietitian (Dietary & Nutritional Service Providers)
- 376K00000X Nurse's Aide (Nursing Service Related Providers)
- 364S00000X Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)
- 367500000X Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers)
- 363L00000X Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers)
Find providers with 163W00000X
Using 163W00000X
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). Checked 2026-10-24. Methodology.