Louis Difronzo, MD
Surgical Oncology Physician · Los Angeles, CA
Louis Difronzo, MD is a surgical oncology physician with a practice address in Los Angeles, California, and NPI 1437220407, issued on Nov 13, 2006. Check the license (California G81895, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Louis Difronzo
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- G81895 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4733 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 783-4011
- Enumerated
- Nov 13, 2006
- Entity
- Type 1 · individual
Also registered at 4733 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Antoine Abcar, MDNephrology Physician1245301159
- Iman Abdalla, MDHematology & Oncology Physician1730248311
- Joseph Abu-Dalu, MDVascular Surgery Physician1821157587
- Isaac Abusleme, M.D.Internal Medicine Physician1891109468
- Nancy Adachi, PTPhysical Therapist1902004245
- Sangeeta Aggarwal, MDInternal Medicine Physician1578655908
Verify Louis Difronzo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G81895Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Surgical Oncology Physician providers in California
There are 250 surgical oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other surgical oncology physician records in California
- Ahmad Abou Abbass, M.DMission Viejo, CA1790946895
- Aziz Ahmad, M.D.Duarte, CA1487866216
- Rahim Aimaq, MDDuarte, CA1710133889
- Yasir AkmalLos Angeles, CA1689832966
- Mohammed Al-Temimi, MDSan Jose, CA1144562836
- Glenn Allison, M.D.Orange, CA1245386051
- Farin Amersi, M.D.West Hollywood, CA1679587604
- Stephanie Angarita, M.D.Downey, CA1003259219
- Elizabeth Arena, M.D.Los Angeles, CA1245460237
- Ava Armani, M.D.San Diego, CA1861759383
Common questions
What is Louis Difronzo, MD's NPI number?
Louis Difronzo, MD's National Provider Identifier (NPI) is 1437220407, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Louis Difronzo, MD located?
The NPPES record lists a practice address at 4733 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 783-4011. Providers update this record themselves, so call before visiting.
How can I verify Louis Difronzo, MD's license?
NPPES lists California license number G81895, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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) 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 27, 2026.