Roberto Leonardo Mempin, M.D.
Internal Medicine Physician · Los Angeles, CA
Roberto Leonardo Mempin, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1063874667, issued on Mar 23, 2016. Check the license (California A150814, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roberto Leonardo Mempin
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A150814 CA
Self-reported in NPPES; status is on the state search - Practice location
- 757 Westwood Plz, Los Angeles, CA 90095
- Phone
- (310) 825-7375
- Enumerated
- Mar 23, 2016
- Record last updated
- May 5, 2022
- Medicare enrollment
- Enrolled (PECOS I20200803002211); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 757 Westwood Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Roberto Leonardo Mempin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A150814Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
440 Medicare Part D claims for 121 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.
Most prescribed
- Albuterol Sulfate Hfa77 claims
- Spiriva Respimat72 claims
- Pantoprazole Sodium48 claims
- Breyna40 claims
- Stiolto Respimat23 claims
- Prednisone22 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 GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roberto Leonardo Mempin among 17,696 internal medicine physician records in California
Roberto Leonardo Mempin, M.D. 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 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2016 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
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Common questions
What is Roberto Leonardo Mempin, M.D.'s NPI number?
Roberto Leonardo Mempin, M.D.'s National Provider Identifier (NPI) is 1063874667, issued on Mar 23, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Roberto Leonardo Mempin, M.D. located?
The NPPES record lists a practice address at 757 Westwood Plz, Los Angeles, CA, 90095. Phone: (310) 825-7375. Providers update this record themselves, so call before visiting.
How can I verify Roberto Leonardo Mempin, M.D.'s license?
NPPES lists California license number A150814, 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 Roberto Leonardo Mempin, M.D. prescribe under Medicare Part D?
In 2024, Roberto Leonardo Mempin, M.D. had 440 Medicare Part D claims for 121 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.