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William L. Guy, Ph.D., M.D., P.L.C.

Psychiatry Physician in Southfield, MI · enumerated 2006 · authorized official William Guy, President.

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

National Provider Identifier

1912910894

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Registry record

Entity type Organization (Type 2)
Legal business name William L. Guy, Ph.D., M.D., P.L.C.
Practice address 22170 W 9 Mile Rd, Southfield, MI, 48034
Phone (313) 319-8429
Enumeration date Aug 14, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 4301063551 (MI) Primary

Authorized official

Name William Guy
Title President
Phone (313) 319-8429

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 L. Guy, Ph.D., M.D., P.L.C.?
The NPI for William L. Guy, Ph.D., M.D., P.L.C. is 1912910894, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for William L. Guy, Ph.D., M.D., P.L.C.?
NPPES lists William Guy (President) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.