Taxonomy code 133V00000X: Dietitian, Registered

133V00000X is the NUCC Health Care Provider Taxonomy code for Dietitian, Registered, in the group Dietary & Nutritional Service Providers. It is one of the codes a provider lists on the NPI application to tell CMS and payers what they do.

Code

133V00000X

Grouping

Dietary & Nutritional Service Providers

Classification

Dietitian, Registered

Section

Individual

NUCC version

26.1

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.

NUCC notes: Source: Academy of Nutrition and Dietetics Definition of Terms List , Current Version, https://www.eatrightpro.org/practice/quality-management/scope-of-practice [7/1/2019:modified definition]

Who uses this code

For RD and RDN credential holders.

Dietitians and nutritionists (the usual code)

Get an NPI with this taxonomy

Two free ways. SimpleNPI files the application for you with 133V00000X entered from your license type; the NPI usually arrives by email and text, with all the documentation, within 10 minutes. Or apply yourself at nppes.cms.hhs.gov and type the code into the taxonomy field. First, check the free registry in case you already have an NPI.

Option 1 · Free · Easiest

SimpleNPI files it for you

One short form: name, license, contact, address, identity and an e-signed authorization. About 3 minutes, no CMS account to create.
A person checks your license and address, then files the application with CMS under your signed authorization.
Your NPI arrives by email and text, with all the documentation, usually within 10 minutes. Filed after midnight Eastern? It issues around 6 am Eastern.

Usually within 10 minutes after the form is complete.

Start the free application

Option 2 · Free

Apply yourself at NPPES

Create an Identity & Access account at nppes.cms.hhs.gov.
Choose Apply for an NPI for myself, Individual (Type 1).
Enter identity, addresses, taxonomy code and license number, then certify and submit.

Usually a few business days; often minutes when the Social Security match passes.

Go to NPPES

Related codes in Dietitian, Registered

Code	Name
`133VN1101X`	Dietitian, Registered, Nutrition, Gerontological
`133VN1006X`	Dietitian, Registered, Nutrition, Metabolic
`133VN1201X`	Dietitian, Registered, Nutrition, Obesity and Weight Management
`133VN1301X`	Dietitian, Registered, Nutrition, Oncology
`133VN1004X`	Dietitian, Registered, Nutrition, Pediatric
`133VN1401X`	Dietitian, Registered, Nutrition, Pediatric Critical Care
`133VN1005X`	Dietitian, Registered, Nutrition, Renal
`133VN1501X`	Dietitian, Registered, Nutrition, Sports Dietetics

Questions

Is 133V00000X the right taxonomy code for a dietitian or nutritionist?

Yes. 133V00000X, Dietitian, Registered, is the code SimpleNPI files for dietitians and nutritionists. Related codes some choose instead: 133N00000X (Nutritionist).

Can I change my taxonomy code later?

Yes, for free, in your NPPES account. Add the new code with its license, make it primary, and remove the old one if it no longer applies. The NPI itself never changes.

Does 133V00000X have to match my license?

It should describe the profession your license covers. Payers compare the taxonomy with the license during credentialing, and a mismatch slows that down.

Written by Ammon Hardin, LMT, who grew a massage practice to ten locations, built a veteran therapy network, and credentialed a large number of providers along the way. Updated Tue Oct 27, 2026. Free to read, free to use; SimpleNPI files NPI applications for free.