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David Horwitz, M.D.
NPI 1457389918 · Rheumatology Physician · Los Angeles, CA
David Horwitz, M.D. is a Rheumatology Physician provider in Los Angeles, CA (NPI 1457389918).
Provider details
- NPI number
- 1457389918
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G43389 (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
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
1520 San Pablo St
Suite 1000
Los Angeles, CA 90033-5310
Phone: (626) 457-5839
Street-level locationGet directions
Mailing address
Po Box 31218
Los Angeles, CA 90031-0218
Registry dates
- Enumerated
- 2006-06-30
- Last updated
- 2008-04-14
Frequently asked questions
- What is David Horwitz's NPI number?
- David Horwitz's National Provider Identifier (NPI) is 1457389918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Horwitz's specialty?
- David Horwitz is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is David Horwitz located?
- David Horwitz's practice location on file with NPPES is 1520 San Pablo St, Los Angeles, CA 90033-5310.
- What is David Horwitz's phone number?
- The practice phone number listed in the NPPES registry for David Horwitz is (626) 457-5839.
- Is David Horwitz's NPI active?
- Yes — David Horwitz's NPI (1457389918) is active in the NPPES registry as of the last update on 2008-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.