NUCC taxonomy code

133N00000X - Nutritionist

133N00000X is the NUCC provider taxonomy code for Nutritionist (individual providers). 4,441 providers in our latest NPPES snapshot list it as their primary taxonomy.

4,441 providers · primary taxonomy

Code breakdown

Taxonomy code 133N00000X

Display name Nutritionist

Grouping Dietary & Nutritional Service Providers

Classification Nutritionist

Section Individual

Directory Nutritionist provider directory

Definition

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 from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

133NN1002X Nutrition Education Nutritionist (Nutritionist) 132700000X Dietary Manager 136A00000X Registered Dietetic Technician 133V00000X Registered Dietitian 133VN1101X Gerontological Nutrition Registered Dietitian (Dietitian, Registered) 133VN1006X Metabolic Nutrition Registered Dietitian (Dietitian, Registered) 133VN1201X Obesity and Weight Management Nutrition Registered Dietitian (Dietitian, Registered) 133VN1301X Oncology Nutrition Registered Dietitian (Dietitian, Registered)

Frequently asked questions

What does taxonomy code 133N00000X mean?

133N00000X is the NUCC Health Care Provider Taxonomy code for Nutritionist in the "Dietary & Nutritional Service Providers" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 133N00000X?

Browse the Nutritionist directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-13.