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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

John M Willett MD

Otolaryngology Physician in New Haven, CT · enumerated 2023 · authorized official Elizabeth Sullivan, Practice Manger.

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

National Provider Identifier

1487369591

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Registry record

Entity type Organization (Type 2)
Legal business name John M Willett MD
Parent organization John M Willett MD
Practice address 1 Long Wharf Drive, Suite 302, New Haven, CT, 06511
Phone (203) 777-7500
Fax (203) 777-8469
Enumeration date Jan 23, 2023
Last updated in NPPES Jan 23, 2023

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Elizabeth Sullivan
Title Practice Manger
Phone (230) 777-7500

Other identifiers

Identifier Type State Issuer
001317363 Medicaid CT -

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

Who is the authorized official for John M Willett MD?
NPPES lists Elizabeth Sullivan (Practice Manger) as the authorized official for this organization.
What is the NPI number for John M Willett MD?
The NPI for John M Willett MD is 1487369591, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-23.