Carl Winterstein, MD
NPI 1235207432 · Internal Medicine Physician · Palo Alto, CA
Carl Winterstein, MD is a Internal Medicine Physician provider in Palo Alto, CA (NPI 1235207432).
Provider details
- NPI number
- 1235207432
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G24124 (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
19 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
- 2006-12-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Carl Winterstein's NPI number?
- Carl Winterstein's National Provider Identifier (NPI) is 1235207432, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Winterstein's specialty?
- Carl Winterstein is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carl Winterstein located?
- Carl Winterstein's practice location on file with NPPES is 240 Leland Ave, Palo Alto, CA 94306-1125.
- What is Carl Winterstein's phone number?
- The practice phone number listed in the NPPES registry for Carl Winterstein is (650) 326-6244.
- Is Carl Winterstein's NPI active?
- Yes — Carl Winterstein's NPI (1235207432) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.