Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Donald Leon Theriault, DMD

Periodontics in Portland, ME · enumerated 2007.

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

National Provider Identifier

1669502795

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Registry record

Entity type Individual (Type 1)

Name Dr. Donald Leon Theriault

Credential DMD

Sex Male

Practice address 595 Brighton Ave, Portland, ME, 04102

Phone (207) 774-1471

Enumeration date Mar 7, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License 2974 (ME) 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.

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Frequently asked questions

Where does Donald Theriault practice?

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

What is the NPI number for Donald Theriault?

The National Provider Identifier (NPI) for Donald Theriault is 1669502795, 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.