Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas Edward Hamilton, M.D.

Pediatric Surgery Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1811991201

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Edward Hamilton

Credential M.D.

Sex Male

Practice address 300 Longwood Ave, Fegan 3, Boston, MA, 02115

Phone (617) 355-7800

Enumeration date Jun 13, 2005

Last updated in NPPES May 17, 2022

Taxonomy & licenses

2086S0120X Pediatric Surgery Physician Allopathic & Osteopathic Physicians · License 015360 (ME) Primary

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

Other identifiers

Identifier	Type	State	Issuer
286370099	Medicaid	ME	-

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 Hamilton practice?

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

What is the NPI number for Thomas Hamilton?

The National Provider Identifier (NPI) for Thomas Hamilton is 1811991201, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Barry Zallen Pediatrics Physician · Boston, MA NPI 1588667539 Stacy Drury Child & Adolescent Psychiatry Physician · Boston, MA NPI 1316945116 James Dinardo Anesthesiology Physician · Boston, MA NPI 1962496281 Eric Fleegler Pediatric Emergency Medicine (Pediatrics) Physician · Boston, MA NPI 1215923362 Peter Kriz Pediatric Sports Medicine Physician · Boston, MA NPI 1881681310 Kira Dies Genetic Counselor (M.S.) · Boston, MA NPI 1710975644 Jessie Hastings Genetic Counselor (M.S.) · Boston, MA NPI 1518955442 Lisa Bergersen Pediatric Cardiology Physician · Boston, MA NPI 1942299730

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-17.