Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Douglas Demars Sr.

Registered Nurse in Wolfeboro, NH · enumerated 2026.

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

National Provider Identifier

1861342552

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Registry record

Entity type Individual (Type 1)

Name Douglas Demars Sr.

Sex Male

Practice address 240 S Main St, Wolfeboro, NH, 03894

Phone (603) 569-7500

Enumeration date Feb 2, 2026

Last updated in NPPES Feb 2, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 064261-21 (NH) 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

What is the NPI number for Douglas Demars?

The National Provider Identifier (NPI) for Douglas Demars is 1861342552, a Type 1 (individual) record in the CMS NPPES registry.

Where does Douglas Demars practice?

The practice location on file with NPPES is in Wolfeboro, NH. 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 2026-02-02.