Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Patrick Leong, DO

Internal Medicine Physician in Somerville, MA · enumerated 2005.

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

National Provider Identifier

1447237003

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Patrick Leong

Credential DO

Sex Male

Practice address 440 Foley St, Somerville, MA, 02145

Phone (857) 282-0777

Enumeration date Dec 27, 2005

Last updated in NPPES Aug 2, 2023

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 7813 (NH) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 151924 (MA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
30005217	Medicaid	NH	-

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 Patrick Leong practice?

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

What is the NPI number for Patrick Leong?

The National Provider Identifier (NPI) for Patrick Leong is 1447237003, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-02.