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William Classen

Physical Medicine & Rehabilitation Physician in Katy, TX · enumerated 2020 · practices at Syed V. Ahmed M.D. P.A..

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

National Provider Identifier

1447858162

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Registry record

Entity type Individual (Type 1)
Name William Classen
Sex Male
Practice address 23215 Red River Dr, Katy, TX, 77494
Phone (978) 809-4692
Enumeration date Oct 14, 2020
Last updated in NPPES Oct 14, 2020

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 2146582 (TX) 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.

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Frequently asked questions

What is the NPI number for William Classen?
The National Provider Identifier (NPI) for William Classen is 1447858162, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Classen practice?
The practice location on file with NPPES is in Katy, TX. 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 2020-10-14.