Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William C Faust, M.D.

Urology Physician in Burlington, MA · enumerated 2008.

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

National Provider Identifier

1730342320

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Registry record

Entity type Individual (Type 1)

Name William C Faust

Credential M.D.

Sex Male

Practice address Lahey Hospital and Medical Center, 41 Mall Road, Burlington, MA, 01805

Phone (781) 744-8420

Fax (781) 744-5429

Enumeration date Jul 3, 2008

Last updated in NPPES Jan 4, 2019

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 245424 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 specialty is William Faust?

William Faust is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-04.