William W Winternitz Jr., MD

William W Winternitz Jr. is a Orthopaedic Surgery Physician provider (Orthopaedic Surgery) practicing in Poway, CA, registered in the NPPES registry with NPI 1083676639 since 2006. The credential MD stands for Doctor of Medicine.

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NPI	1083676639
Entity type	Individual (Type 1)
Name	William W Winternitz Jr.
Credential	MD
Sex	Male
Practice address	12630 MONTE VISTA RD, #105, Poway, CA, 92064
Phone	8584876440
Fax	8584877281
Enumeration date	2006-04-06
Last updated in NPPES	2017-03-10

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
207X00000X	Orthopaedic Surgery Physician	Primary	G51348	CA

MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
OOG513980	Medicaid	CA	—

Copy-ready billing details

Provider: William Winternitz, MD
NPI: 1083676639
Taxonomy: 207X00000X (Orthopaedic Surgery Physician)
Address: 12630 MONTE VISTA RD, #105, Poway, CA, 92064

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1235134966	Vrijesh Tantuwaya	Individual	Neurological Surgery Physician	Poway, CA
1720038458	Lon Poliner	Individual	Ophthalmology Physician	Poway, CA
1790736098	Retina Consultants San Diego Inc	Organization	Ophthalmology Physician	Poway, CA
1265483085	Cynthia Robertson	Individual	Internal Medicine Physician	Poway, CA
1477595189	Ashish Wadhwa	Individual	Otolaryngology Physician	Poway, CA
1477599298	Robert Barr	Individual	Pediatrics Physician	Poway, CA
1154330496	Mary Hall	Individual	Physical Therapist	Poway, CA
1952310583	Mary Pat Hall Physical Therapy Inc	Organization	Physical Therapist	Poway, CA

Verify this record

Cross-check NPI 1083676639 against the authoritative CMS record: view William W Winternitz Jr. on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

Where does William Winternitz practice?

The practice location on file with NPPES is in Poway, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Winternitz?

The National Provider Identifier (NPI) for William Winternitz is 1083676639, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2017-03-10.