Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas F Fitzsimons, M.D.

Specialist in Allentown, PA · enumerated 2006.

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

National Provider Identifier

1639133705

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas F Fitzsimons

Credential M.D.

Sex Male

Practice address 1200 S Cedar Crest Blvd, Allentown, PA, 18103

Phone (610) 402-8080

Enumeration date Apr 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD023370E (PA) 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

Where does Thomas Fitzsimons practice?

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

What is the NPI number for Thomas Fitzsimons?

The National Provider Identifier (NPI) for Thomas Fitzsimons is 1639133705, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.