Jeff Borenstein, MD
Internal Medicine Physician · Porter Ranch, CA
Jeff Borenstein, MD is an internal medicine physician with a practice address in Porter Ranch, California, and NPI 1326260522, issued on May 3, 2007. Check the license (California G075307, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jeff Borenstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G075307 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19950 Rinaldi St Ste 300, Porter Ranch, CA 91326
- Phone
- (818) 271-2400
- Enumerated
- May 3, 2007
- Entity
- Type 1 · individual
Also registered at 19950 Rinaldi St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vindeep BhandariInternal Medicine Physician1164832069
- Helen Huang, M.D.Student in an Organized Health Care Education/Training Program1588921498
- Kevork Khadarian, MDGastroenterology Physician1245734789
- Raghu Konanur VenkataramInternal Medicine Physician1447538079
- Jelena MaletkovicEndocrinology, Diabetes & Metabolism Physician1093087504
- Levon Mesropyan, M.D.Pediatrics Physician1205299302
Verify Jeff Borenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G075307Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
32% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,907 Medicare Part D claims for 249 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Atorvastatin Calcium234 claims
- Amlodipine Besylate103 claims
- Alendronate Sodium78 claims
- Rosuvastatin Calcium77 claims
- Levothyroxine Sodium64 claims
- Sertraline Hcl64 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.
One hospital or facility affiliation
- The Regents OF The University OF CaliforniaPorter Ranch, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
17 internal medicine physician records list a Porter Ranch practice address
They are 17 of the 275 NPPES records with a Porter Ranch practice address, and 20,403 internal medicine physician records in California.
All 17 in Porter Ranch → All 20,403 in California → Every provider in Porter Ranch →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Jeff Borenstein, MD's NPI number?
Jeff Borenstein, MD's National Provider Identifier (NPI) is 1326260522, issued on May 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jeff Borenstein, MD located?
The NPPES record lists a practice address at 19950 Rinaldi St Ste 300, Porter Ranch, CA, 91326. Phone: (818) 271-2400. Providers update this record themselves, so call before visiting.
How can I verify Jeff Borenstein, MD's license?
NPPES lists California license number G075307, 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 Jeff Borenstein, MD prescribe under Medicare Part D?
In 2024, Jeff Borenstein, MD had 1,907 Medicare Part D claims for 249 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.