Nutritionist
4,441 active US providers register Nutritionist as their primary taxonomy. That is 0.05% of every provider in the registry, and the 202nd largest of 584 specialties with a page here.
- Taxonomy code
- 133N00000X
- Grouping
- Dietary & Nutritional Service Providers
- Classification
- Nutritionist
- Active providers
- 4,441
- States covered
- 51 of 51
What the code means
A specialist in adapting and applying food and nutrient knowledge to the solution of food and nutritional problems, the control of disease, and the promotion of health. Nutritionists perform research, instruct groups and individuals about nutritional requirements, and assist people in developing meal patterns that meet their nutritional needs; (2) A nutritionist is someone who has completed undergraduate and/or graduate training in the discipline of nutrition without necessarily meeting the academic and experience requirements to qualify for the Registered Dietitian designation.
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 | 500 | |
| New York | 421 | |
| Texas | 266 | |
| Maryland | 257 | |
| Florida | 241 | |
| Washington | 223 | |
| Colorado | 199 | |
| Pennsylvania | 166 | |
| New Jersey | 161 | |
| Virginia | 140 | |
| Illinois | 136 | |
| Massachusetts | 134 | |
| Connecticut | 130 | |
| North Carolina | 113 | |
| Oregon | 109 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
3,952 of these are people and 489 are organisations, so 11% of the code is businesses rather than clinicians. Half of them had registered by 2019, and 1,959 registered in the last five years, 44% 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.
- NEW YORK, NY73
- SEATTLE, WA67
- BROOKLYN, NY67
- SAN DIEGO, CA56
- PORTLAND, OR50
- DENVER, CO50
- HOUSTON, TX36
- BALTIMORE, MD36
- CHICAGO, IL33
- LOS ANGELES, CA29
What else they list
Providers whose primary code is Nutritionist 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 Dietitian | 253 | 5.7% |
| Nutrition Education Nutritionist | 250 | 5.6% |
| Health & Wellness Coach | 92 | 2.1% |
| Health Educator | 59 | 1.3% |
| Massage Therapist | 23 | 0.5% |
| Chiropractor | 20 | 0.5% |
| Naturopath | 20 | 0.5% |
| Renal Nutrition Registered Dietitian | 15 | 0.3% |
Nearby specialties
Other taxonomies NUCC files under Nutritionist.
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.