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

Leslie K Mack, MS, RDN, LD

Q: What is the NPI number for Leslie Mack?

The National Provider Identifier (NPI) for Leslie Mack is 1528531654, a Type 1 (individual) record in the CMS NPPES registry.

Registered Dietitian in Alpharetta, GA · enumerated 2019.

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

National Provider Identifier

1528531654

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Registry record

Entity type Individual (Type 1)

Name Leslie K Mack

Credential MS, RDN, LD

Sex Female

Practice address Alpharetta, GA, 30004

Phone (678) 554-7576

Enumeration date Jan 11, 2019

Last updated in NPPES Jul 7, 2025

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

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers Primary

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 Leslie Mack?

The National Provider Identifier (NPI) for Leslie Mack is 1528531654, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leslie Mack practice?

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

Other providers at this practice address

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