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Mill Brook Pediatrics

Pediatric Adolescent Medicine Physician in Sudbury, MA · enumerated 2006 · authorized official William Wirth, Doctor.

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

National Provider Identifier

1609975069

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Registry record

Entity type Organization (Type 2)
Legal business name Mill Brook Pediatrics
Practice address 490 Boston Post Rd, Sudbury, MA, 01776
Phone (978) 443-0707
Enumeration date Sep 22, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

2080A0000X Pediatric Adolescent Medicine Physician Allopathic & Osteopathic Physicians · License 79768 (MA) Primary

Authorized official

Name William Wirth
Title Doctor
Phone (978) 443-0707

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.

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Frequently asked questions

Who is the authorized official for Mill Brook Pediatrics?
NPPES lists William Wirth (Doctor) as the authorized official for this organization.
What is the NPI number for Mill Brook Pediatrics?
The NPI for Mill Brook Pediatrics is 1609975069, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.