Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charlotte O'Brien Tomczyk, MS, RD

Registered Dietitian in Saline, MI · enumerated 2025.

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

National Provider Identifier

1639969462

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Registry record

Entity type Individual (Type 1)

Name Charlotte O'Brien Tomczyk

Credential MS, RD

Sex Female

Practice address 6626 Sauk Trl, Saline, MI, 48176

Phone (734) 273-9169

Enumeration date May 6, 2025

Last updated in NPPES May 6, 2025

Taxonomy & licenses

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

What is the NPI number for Charlotte O'Brien Tomczyk?

The National Provider Identifier (NPI) for Charlotte O'Brien Tomczyk is 1639969462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Charlotte O'Brien Tomczyk practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-06.