Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Cantlon, MD

Orthopaedic Hand Surgery Physician in Greenwich, CT · enumerated 2010.

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

National Provider Identifier

1144546888

Verified

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Registry record

Entity type Individual (Type 1)

Name Matthew Cantlon

Credential MD

Sex Male

Practice address 6 Greenwich Office Park, Greenwich, CT, 06831

Phone (203) 869-1145

Fax (203) 618-1721

Enumeration date Apr 19, 2010

Last updated in NPPES May 3, 2023

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 55040 (CT) Secondary

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 55040 (CT) 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 is the NPI number for Matthew Cantlon?

The National Provider Identifier (NPI) for Matthew Cantlon is 1144546888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Matthew Cantlon practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-03.