Addiction (Substance Use Disorder) Registered Nurse

2,641 active US providers register Addiction (Substance Use Disorder) Registered Nurse as their primary taxonomy. That is 0.03% of every provider in the registry, and the 259th largest of 584 specialties with a page here.

Taxonomy code

163WA0400X

Grouping

Nursing Service Providers

Classification

Registered Nurse

Specialization

Addiction (Substance Use Disorder)

Active providers

2,641

States covered

49 of 51

What the code means

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.

Showing the 15 largest of 49 states with at least one.

Who registers under this code

2,612 of these are people and 29 are organisations, so 1% of the code is businesses rather than clinicians. Half of them had registered by 2021, and 1,328 registered in the last five years, 50% 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.

• COLUMBUS, OH49
• DAYTON, OH49
• NEW YORK, NY42
• MADISON, WI39
• ANCHORAGE, AK36
• ALBUQUERQUE, NM32
• ONALASKA, WI31
• BRONX, NY28
• DEVON, PA27
• LA CROSSE, WI26

What else they list

Providers whose primary code is Addiction (Substance Use Disorder) 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.

Nearby specialties

Other taxonomies NUCC files under Registered Nurse.

• Administrator Registered Nurse2,424
• Diabetes Educator Registered Nurse2,305
• Registered Nurse First Assistant2,980
• Pediatric Registered Nurse2,273
• Medical-Surgical Registered Nurse3,079
• Ambulatory Care Registered Nurse3,325

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.