Ivan Ernesto Leroux, MD
Internal Medicine Physician · Upland, CA
Ivan Ernesto Leroux, MD is an internal medicine physician with a practice address in Upland, California, and NPI 1568088110, issued on Jun 19, 2020. Check the license (California A183662, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ivan Ernesto Leroux
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A183662 CA
Self-reported in NPPES; status is on the state search - Practice location
- 330 E 7TH St FL 2, Upland, CA 91786
- Phone
- (800) 213-8517
- Enumerated
- Jun 19, 2020
- Record last updated
- Dec 22, 2023
- Medicare enrollment
- Enrolled (PECOS I20230824001024); accepts Medicare assignment
- Medical or professional school
- Meharry Medical College School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 330 E 7TH St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steve Hing, L.AC, QMEAcupuncturist1871021774
Verify Ivan Ernesto Leroux in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A183662Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,581 Medicare Part D claims for 538 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 87 claims were for opioids.
Most prescribed
- Atorvastatin Calcium196 claims
- Amlodipine Besylate109 claims
- Meloxicam97 claims
- Omeprazole89 claims
- Losartan Potassium81 claims
- Ibuprofen75 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ivan Ernesto Leroux among 17,696 internal medicine physician records in California
Ivan Ernesto Leroux, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Upland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nahel Al Bouz, M.D.Upland, CA 917861326235136
- Susan Biegel, M.D.Upland, CA 917861710956412
- Michael Chai, M.D.Upland, CA 917861083748727
- Johnny Choi, M.D.Upland, CA 917861376640714
- Michael Creagan, MDUpland, CA 917861487813002
- David Engelhardt, M.D.Upland, CA 917861972595122
- Ghassan Hadi, M.D.Upland, CA 917861558497891
- Bhupal Kommineni, MD FACPUpland, CA 917861457324808
Common questions
What is Ivan Ernesto Leroux, MD's NPI number?
Ivan Ernesto Leroux, MD's National Provider Identifier (NPI) is 1568088110, issued on Jun 19, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ivan Ernesto Leroux, MD located?
The NPPES record lists a practice address at 330 E 7TH St FL 2, Upland, CA, 91786. Phone: (800) 213-8517. Providers update this record themselves, so call before visiting.
How can I verify Ivan Ernesto Leroux, MD's license?
NPPES lists California license number A183662, 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 Ivan Ernesto Leroux, MD prescribe under Medicare Part D?
In 2024, Ivan Ernesto Leroux, MD had 2,581 Medicare Part D claims for 538 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.