Joseph Brandon De La Merced, M.D.
Internal Medicine Physician · Los Angeles, CA
Joseph Brandon De La Merced, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1578907051, issued on Apr 26, 2013. Check the license (California A133310, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Brandon De La Merced
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A133310 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4950 W Sunset Blvd FL 6, Los Angeles, CA 90027
- Phone
- (323) 783-4516
- Enumerated
- Apr 26, 2013
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150917001943); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4950 W Sunset Blvd FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Brandon De La Merced in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A133310Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
342 Medicare Part D claims for 122 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil22 claims
- Atorvastatin Calcium17 claims
- Pradaxa15 claims
- Amlodipine Besylate12 claims
- Furosemide12 claims
- Metoprolol Tartrate12 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 GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Brandon De La Merced among 17,696 internal medicine physician records in California
Joseph Brandon De La Merced, 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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 →
The 8 internal medicine physician records with the nearest ZIP codes
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- Martin Hirsch, MDLos Angeles, CA 900271881765774
- Missak Kltchian, MDLos Angeles, CA 900271255359840
- Ani Markarian, M.D.Los Angeles, CA 900271457305435
- Lyn Pestana, MDLos Angeles, CA 900271013088996
- Edward Quiming, MDLos Angeles, CA 900271497826465
Common questions
What is Joseph Brandon De La Merced, M.D.'s NPI number?
Joseph Brandon De La Merced, M.D.'s National Provider Identifier (NPI) is 1578907051, issued on Apr 26, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Brandon De La Merced, M.D. located?
The NPPES record lists a practice address at 4950 W Sunset Blvd FL 6, Los Angeles, CA, 90027. Phone: (323) 783-4516. Providers update this record themselves, so call before visiting.
How can I verify Joseph Brandon De La Merced, M.D.'s license?
NPPES lists California license number A133310, 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 Joseph Brandon De La Merced, M.D. prescribe under Medicare Part D?
In 2024, Joseph Brandon De La Merced, M.D. had 342 Medicare Part D claims for 122 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.