Robert Horowitz, MD
NPI 1588628812 · Internal Medicine Physician · San Jose, CA
Robert Horowitz, MD is a Internal Medicine Physician provider in San Jose, CA (NPI 1588628812).
Provider details
- NPI number
- 1588628812
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G45180 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-04-13
- Last updated
- 2007-09-11
Frequently asked questions
- What is Robert Horowitz's NPI number?
- Robert Horowitz's National Provider Identifier (NPI) is 1588628812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Horowitz's specialty?
- Robert Horowitz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Horowitz located?
- Robert Horowitz's practice location on file with NPPES is 500 Tully Rd, San Jose, CA 95111-1917.
- What is Robert Horowitz's phone number?
- The practice phone number listed in the NPPES registry for Robert Horowitz is (408) 494-7422.
- Is Robert Horowitz's NPI active?
- Yes — Robert Horowitz's NPI (1588628812) is active in the NPPES registry as of the last update on 2007-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.