Charles Winkelstein, M.D.
NPI 1477740769 · Obstetrics & Gynecology Physician · San Mateo, CA
Charles Winkelstein, M.D. is a Obstetrics & Gynecology Physician provider in San Mateo, CA (NPI 1477740769).
Provider details
- NPI number
- 1477740769
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G11001 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-01
- Last updated
- 2007-10-01
Frequently asked questions
- What is Charles Winkelstein's NPI number?
- Charles Winkelstein's National Provider Identifier (NPI) is 1477740769, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Winkelstein's specialty?
- Charles Winkelstein is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Winkelstein located?
- Charles Winkelstein's practice location on file with NPPES is 304 Arlington Ln, San Mateo, CA 94402-1277.
- What is Charles Winkelstein's phone number?
- The practice phone number listed in the NPPES registry for Charles Winkelstein is (650) 343-4288.
- Is Charles Winkelstein's NPI active?
- Yes — Charles Winkelstein's NPI (1477740769) is active in the NPPES registry as of the last update on 2007-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.