Ambulatory Care Registered Nurse
3,325 active US providers register Ambulatory Care Registered Nurse as their primary taxonomy. That is 0.04% of every provider in the registry, and the 233rd largest of 584 specialties with a page here.
- Taxonomy code
- 163WP2201X
- Grouping
- Nursing Service Providers
- Classification
- Registered Nurse
- Specialization
- Ambulatory Care
- Active providers
- 3,325
- States covered
- 51 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 |
|---|---|---|
| California | 939 | |
| Ohio | 198 | |
| Massachusetts | 161 | |
| Texas | 160 | |
| Wisconsin | 144 | |
| Michigan | 122 | |
| Colorado | 111 | |
| New Mexico | 96 | |
| New York | 90 | |
| South Dakota | 80 | |
| Arizona | 79 | |
| Washington | 68 | |
| Minnesota | 68 | |
| Missouri | 61 | |
| Indiana | 59 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
Almost all of these are individual clinicians: 3,304 people against 21 organisations. Half of them had registered by 2021, and 1,683 registered in the last five years, 51% 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.
- LOS ANGELES, CA272
- OAKLAND, CA79
- TORRANCE, CA78
- COLUMBUS, OH61
- TOMAH, WI55
- VAN NUYS, CA54
- SYLMAR, CA49
- SAN ANTONIO, TX44
- CAMBRIDGE, MA40
- ANN ARBOR, MI37
What else they list
Providers whose primary code is Ambulatory Care 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 |
|---|---|---|
| Registered Nurse | 52 | 1.6% |
| General Practice Registered Nurse | 17 | 0.5% |
| Community Health Registered Nurse | 14 | 0.4% |
| Emergency Registered Nurse | 11 | 0.3% |
| Medical-Surgical Registered Nurse | 11 | 0.3% |
| Administrator Registered Nurse | 10 | 0.3% |
| Family Nurse Practitioner | 9 | 0.3% |
| Case Management Registered Nurse | 8 | 0.2% |
Nearby specialties
Other taxonomies NUCC files under Registered Nurse.
- Medical-Surgical Registered Nurse3,079
- Emergency Registered Nurse3,605
- Registered Nurse First Assistant2,980
- Addiction (Substance Use Disorder) Registered Nurse2,641
- Critical Care Medicine Registered Nurse4,209
- Administrator Registered Nurse2,424
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.