David Horowitz
Dermatology Physician · Torrance, CA
David Horowitz is a dermatology physician with a practice address in Torrance, California, and NPI 1285675538, issued on Jun 9, 2006. Check the license (California 20A4092, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Horowitz
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 20A4092 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23550 Hawthorne Blvd Ste 200, Torrance, CA 90505
- Phone
- (310) 373-2636
- Enumerated
- Jun 9, 2006
- Record last updated
- Oct 15, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (310) 373-2633
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 23550 Hawthorne Blvd Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Horowitz, DODermatology Physician1669413878
- Michael Kassardjian, D.O.Dermatology Physician1740567981
- Divya Sachdev, MDDermatology Physician1316204936
Verify David Horowitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A4092Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average dermatology physician in 2024
93 Medicare Part D claims, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
David Horowitz among 2,083 dermatology physician records in California
David Horowitz is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2012 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Torrance → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Ronald Algra, MDTorrance, CA 905051669588695
- Melissa Camouse, D.O.Torrance, CA 905051689885279
- Noah Craft, M.D.Torrance, CA 905051750351193
- Susan Goodlerner, M.D.Torrance, CA 905051588710834
- Mark Horowitz, DOTorrance, CA 905051669413878
- Julie Iwasaki, M.D.Torrance, CA 905051548416019
- Shirlene Jay, MDTorrance, CA 905051730158197
- Sree Karukonda, MDTorrance, CA 905051548318322
Common questions
What is David Horowitz's NPI number?
David Horowitz's National Provider Identifier (NPI) is 1285675538, issued on Jun 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Horowitz located?
The NPPES record lists a practice address at 23550 Hawthorne Blvd Ste 200, Torrance, CA, 90505. Phone: (310) 373-2636. Providers update this record themselves, so call before visiting.
How can I verify David Horowitz's license?
NPPES lists California license number 20A4092, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Horowitz prescribe under Medicare Part D?
In 2024, David Horowitz had 93 Medicare Part D claims; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.