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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William P Ryan, D.M.D.

General Practice Dentistry in Winsted, CT · enumerated 2006.

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

National Provider Identifier

1548354012

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Registry record

Entity type Individual (Type 1)
Name William P Ryan
Credential D.M.D.
Sex Male
Practice address Winsted, CT, 06098
Phone (860) 379-4382
Fax (860) 738-4720
Enumeration date Oct 2, 2006
Last updated in NPPES Dec 16, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 6363 (CT) Secondary
1223G0001X General Practice Dentistry Dental Providers · License 6363 (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.

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Frequently asked questions

What is the NPI number for William Ryan?
The National Provider Identifier (NPI) for William Ryan is 1548354012, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Ryan practice?
The practice location on file with NPPES is in Winsted, CT. 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 2014-12-16.