133V00000X — Registered Dietitian

133V00000X is the NUCC provider taxonomy code for Registered Dietitian (individual providers). 73,223 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	133V00000X
Display name	Registered Dietitian
Grouping	Dietary & Nutritional Service Providers
Classification	Dietitian, Registered
Section	Individual
Directory	Dietitian, Registered provider directory

Definition

A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

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)
133VN1004X — Pediatric Nutrition Registered Dietitian (Dietitian, Registered)
133VN1401X — Pediatric Critical Care Nutrition Registered Dietitian (Dietitian, Registered)
133VN1005X — Renal Nutrition Registered Dietitian (Dietitian, Registered)
133VN1501X — Sports Dietetics Nutrition Registered Dietitian (Dietitian, Registered)

Frequently asked questions

What does taxonomy code 133V00000X mean?

133V00000X is the NUCC Health Care Provider Taxonomy code for Registered Dietitian 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 133V00000X?

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

Source: CMS NPPES (public data). Snapshot 2026-07-09.