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David Feinstein, MD
NPI 1609810597 · Internal Medicine Physician · Sunnyvale, CA
David Feinstein, MD is a Internal Medicine Physician provider in Sunnyvale, CA (NPI 1609810597).
Provider details
- NPI number
- 1609810597
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G83862 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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
1413 Knowlton Dr
Sunnyvale, CA 94087-3152
Phone: (805) 602-0386
Street-level locationGet directions
Mailing address
1413 Knowlton Dr
Sunnyvale, CA 94087-3152
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is David Feinstein's NPI number?
- David Feinstein's National Provider Identifier (NPI) is 1609810597, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Feinstein's specialty?
- David Feinstein is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Feinstein located?
- David Feinstein's practice location on file with NPPES is 1413 Knowlton Dr, Sunnyvale, CA 94087-3152.
- What is David Feinstein's phone number?
- The practice phone number listed in the NPPES registry for David Feinstein is (805) 602-0386.
- Is David Feinstein's NPI active?
- Yes — David Feinstein's NPI (1609810597) 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.