Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Tonja Alexandra Werkman, RD

Registered Dietitian in Oradell, NJ · enumerated 2018.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1568959021

Verified

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Registry record

Entity type Individual (Type 1)

Name Ms. Tonja Alexandra Werkman

Credential RD

Sex Female

Practice address Oradell, NJ, 07649

Phone (732) 267-0490

Enumeration date Apr 19, 2018

Last updated in NPPES Apr 19, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

133VN1005X Renal Nutrition Registered Dietitian Dietary & Nutritional Service Providers Secondary

133VN1006X Metabolic Nutrition Registered Dietitian Dietary & Nutritional Service Providers Secondary

133V00000X Registered Dietitian Dietary & Nutritional Service Providers Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Tonja Werkman practice?

The practice location on file with NPPES is in Oradell, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Tonja Werkman?

The National Provider Identifier (NPI) for Tonja Werkman is 1568959021, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-19.