NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mazzoni Operations, LLC

Registered Dietitian in Sudbury, MA · enumerated 2023 · authorized official D Mazzoni, Owner.

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

National Provider Identifier

1538936885

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Mazzoni Operations, LLC
Practice address 437 Cold Brook Dr Unit 1-107, Sudbury, MA, 01776
Phone (781) 591-0444
Enumeration date Dec 6, 2023
Last updated in NPPES Jan 11, 2024

Taxonomy & classification

133V00000X Registered Dietitian Dietary & Nutritional Service Providers Primary

Authorized official

Name D Mazzoni
Title Owner
Phone (781) 591-0444

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

Who is the authorized official for Mazzoni Operations, LLC?
NPPES lists D Mazzoni (Owner) as the authorized official for this organization.
What is the NPI number for Mazzoni Operations, LLC?
The NPI for Mazzoni Operations, LLC is 1538936885, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-11.