Eli Besser
Emergency Medicine Physician · San Diego, CA
Eli Besser is an emergency medicine physician with a practice address in San Diego, California, and NPI 1659843738, issued on Dec 29, 2018. Check the license (California 20A1967, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Eli Besser
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A1967 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10243 Genetic Center Dr, San Diego, CA 92121
- Phone
- (858) 526-6100
- Enumerated
- Dec 29, 2018
- Record last updated
- Oct 14, 2022
- Medicare enrollment
- Enrolled (PECOS I20221028001531); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 10243 Genetic Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Basil Abramowitz, M.D.Family Medicine Physician1104832047
- Courtney Aivati, M.S., CCC-SLPSpeech-Language Pathologist1194157172
- Michelle Arnold, M.D.Otolaryngology Physician1417921891
- Ronald Benz, M.D.Otolaryngology Physician1043328503
- Stanley Besser, M.D.Family Medicine Physician1760490031
- Douglas Brewster, M.D.Pediatric Otolaryngology Physician1609848316
Verify Eli Besser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A1967Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average emergency medicine physician in 2024
353 Medicare Part D claims for 227 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 46 claims were for opioids.
Most prescribed
- Ondansetron Odt36 claims
- Hydrocodone-Acetaminophen30 claims
- Ibuprofen29 claims
- Cephalexin28 claims
- Cefdinir23 claims
- Azithromycin21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Encinitas Emergency Medicine IncEncinitas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eli Besser among 7,751 emergency medicine physician records in California
Eli Besser is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 81% of them.
- NPI issued2018 · 81% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2020 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in San Diego → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Dennis Chan, M.D.San Diego, CA 921211366410912
- William Christiansen, M.D.San Diego, CA 921211831107952
- David Clark, M.D.San Diego, CA 921211225046196
- Gary Gluck, M.D.San Diego, CA 921211184603110
- Diane Gottschalk, M.D.San Diego, CA 921211376881078
- Khan Ha, M.D.San Diego, CA 921211184625212
- Eric Lovell, M.D.San Diego, CA 921211346240967
- Lisa Lowe, M.D., M.P.H.San Diego, CA 921211669578050
Common questions
What is Eli Besser's NPI number?
Eli Besser's National Provider Identifier (NPI) is 1659843738, issued on Dec 29, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Eli Besser located?
The NPPES record lists a practice address at 10243 Genetic Center Dr, San Diego, CA, 92121. Phone: (858) 526-6100. Providers update this record themselves, so call before visiting.
How can I verify Eli Besser's license?
NPPES lists California license number 20A1967, 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 Eli Besser prescribe under Medicare Part D?
In 2024, Eli Besser had 353 Medicare Part D claims for 227 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Eli Besser's MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.