Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William James Winter III, PA-C
Physician Assistant in Madera, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588791669
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Registry record
Entity type Individual (Type 1)
Name William James Winter III
Credential PA-C
Sex Male
Practice address 9300 Valley Childrens Pl # Fc06, Madera, CA, 93636
Phone (559) 353-5803
Enumeration date Feb 27, 2007
Last updated in NPPES Jul 29, 2022
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA18787 (CA) 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.
Frequently asked questions
Where does William Winter practice?
The practice location on file with NPPES is in Madera, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Winter?
The National Provider Identifier (NPI) for William Winter is 1588791669, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → James Leoni Pediatric Emergency Medicine (Emergency Medicine) Physician · Madera, CA NPI 1821394644 Brent Feudale Pediatric Emergency Medicine (Pediatrics) Physician · Madera, CA NPI 1598025116 Michael Hazboun Pediatrics Physician · Madera, CA NPI 1558755678 Kayla Barnes Pediatric Emergency Medicine (Emergency Medicine) Physician · Madera, CA NPI 1144617879
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-29.