Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew S Cantner, D.M.D.

Periodontics in Old Saybrook, CT · enumerated 2006.

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

National Provider Identifier

1871507798

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew S Cantner

Credential D.M.D.

Sex Male

Practice address 97 Elm St, Old Saybrook, CT, 06475

Phone (860) 388-4439

Fax (860) 938-8449

Enumeration date Jul 28, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License 9294 (CT) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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 Cantner?

The National Provider Identifier (NPI) for Matthew Cantner is 1871507798, a Type 1 (individual) record in the CMS NPPES registry.

Where does Matthew Cantner practice?

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

Other providers at this practice address

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