Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David C Thayer, FNPC

Q: What is the NPI number for David Thayer?

The National Provider Identifier (NPI) for David Thayer is 1871687939, a Type 1 (individual) record in the CMS NPPES registry.

Family Nurse Practitioner in Winterport, ME · enumerated 2006.

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

National Provider Identifier

1871687939

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Registry record

Entity type Individual (Type 1)

Name David C Thayer

Credential FNPC

Sex Male

Practice address 775 N Main St, Winterport, ME, 04496

Phone (207) 223-0965

Fax (207) 223-0975

Enumeration date Oct 3, 2006

Last updated in NPPES May 5, 2021

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CNP161174 (ME) Primary

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 David Thayer practice?

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

What is the NPI number for David Thayer?

The National Provider Identifier (NPI) for David Thayer is 1871687939, 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 2021-05-05.