Inpatient Obstetric Registered Nurse
482 active US providers register Inpatient Obstetric Registered Nurse as their primary taxonomy. That is 0.01% of every provider in the registry, and the 499th largest of 584 specialties with a page here.
- Taxonomy code
- 163WX0003X
- Grouping
- Nursing Service Providers
- Classification
- Registered Nurse
- Specialization
- Obstetric, Inpatient
- Active providers
- 482
- States covered
- 49 of 51
What the code means
Definition to come...
Definition quoted verbatim from the NUCC Health Care Provider Taxonomy code set, version 25.1. Not paraphrased.
Where they are
Counted by practice location, not by mailing address or by licence state. A provider practising across a state line is counted where they practise.
| State | Providers | Share |
|---|---|---|
| Arizona | 40 | |
| California | 35 | |
| Texas | 34 | |
| Colorado | 27 | |
| Georgia | 22 | |
| Washington | 21 | |
| North Carolina | 20 | |
| Florida | 19 | |
| New Mexico | 19 | |
| Massachusetts | 16 | |
| New York | 12 | |
| Ohio | 11 | |
| Alabama | 11 | |
| Alaska | 10 | |
| Illinois | 10 |
Showing the 15 largest of 49 states with at least one.
Who registers under this code
Almost all of these are individual clinicians: 481 people against 1 organisations. Half of them had registered by 2024, and 303 registered in the last five years, 63% of the current population.
That is a fast-growing code. A population where a large share registered recently is either a genuinely expanding field or a category NPPES added late, and the taxonomy definition above usually tells you which.
Where the practices are
By practice-location city. City counts are noisier than state counts, because a large employer files one address for many providers.
- PHOENIX, AZ24
- GALLUP, NM18
- DENVER, CO9
- CHARLOTTE, NC8
- SITKA, AK6
- TUBA CITY, AZ6
- CHICAGO, IL6
- SEATTLE, WA6
- WASHINGTON, DC6
- FORT STEWART, GA5
What else they list
Providers whose primary code is Inpatient Obstetric Registered Nurse most often carry these secondary taxonomies as well. This is the closest thing the registry has to a map of which specialties overlap in practice, and it is not published anywhere else.
| Also listed | Providers | Share |
|---|---|---|
| High-Risk Obstetric Registered Nurse | 19 | 3.9% |
| Maternal Newborn Registered Nurse | 18 | 3.7% |
| Registered Nurse | 10 | 2.1% |
| Low-Risk Neonatal Registered Nurse | 9 | 1.9% |
| Perinatal Registered Nurse | 5 | 1.0% |
| Family Nurse Practitioner | 4 | 0.8% |
| Student in an Organized Health Care Education/Training Program | 4 | 0.8% |
| Women's Health Nurse Practitioner | 4 | 0.8% |
Nearby specialties
Other taxonomies NUCC files under Registered Nurse.
- Hospice Registered Nurse514
- Neonatal Intensive Care Registered Nurse522
- Continuing Education/Staff Development Registered Nurse430
- Rehabilitation Registered Nurse387
- Occupational Health Registered Nurse368
- Gastroenterology Registered Nurse365
Looking up a specific provider
These counts come from the monthly NPPES file. To check one provider, use their NPI: the lookup reads the live registry and shows whether the identifier is still active, which the monthly file cannot tell you about the last few weeks.
Counts from npidata_pfile_20050523-20260712.csv, built 2026-08-09. Primary taxonomy only, deactivated identifiers excluded.