Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William R Dufresne
Physical Therapist in Littleton, NH · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164740494
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Registry record
Entity type Individual (Type 1)
Name William R Dufresne
Sex Male
Practice address 551 Meadow St, Littleton, NH, 03561
Phone (603) 838-2800
Enumeration date May 11, 2010
Last updated in NPPES May 11, 2010
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 3179 (NH) Primary
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 0400003317 (VT) Secondary
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.
Frequently asked questions
What specialty is William Dufresne?
William Dufresne is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-11.