Santiago Lopez
Emergency Medicine Physician · Fontana, CA
Santiago Lopez is an emergency medicine physician with a practice address in Fontana, California, and NPI 1104489897, issued on Apr 17, 2019. Check the license (California 184318, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Santiago Lopez
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 184318 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9961 Sierra Ave, Fontana, CA 92335
- Phone
- (833) 574-2273
- Enumerated
- Apr 17, 2019
- Record last updated
- Oct 27, 2023
- Fax
- (833) 574-2273
- Medicare enrollment
- Enrolled (PECOS I20231009001652); 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 9961 Sierra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Marla Abrolat, MDPediatrics Physician1164593133
- Eduardo Acosta, MDPediatrics Physician1497803324
- Michael Adair, MDFamily Medicine Physician1780732651
- Berneva Adams, MDObstetrics & Gynecology Physician1376602987
Verify Santiago Lopez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 184318Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% more Medicare Part D claims than the average emergency medicine physician in 2024
357 Medicare Part D claims for 224 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 39 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil65 claims
- Azithromycin24 claims
- Oxycodone-Acetaminophen22 claims
- Methocarbamol18 claims
- Prednisone18 claims
- Ibuprofen17 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 GroupFontana, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Santiago Lopez among 7,751 emergency medicine physician records in California
Santiago Lopez 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 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2019 · median 2011 among the 4,560 with a school on file
- Record last updated2023 · 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).
55 emergency medicine physician records list a practice address in Fontana
They are 55 of the 3,012 NPPES records with a practice address in Fontana, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fontana → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Pierre Assaf, MDFontana, CA 923351417969973
- Greg Capestany, MDFontana, CA 923351134277007
- Pushkar Chand, M.D.Fontana, CA 923351013074582
- Jonathan Chock, MDFontana, CA 923351770650624
- Karita Goulbourne, MDFontana, CA 923351619044500
- Charlene Jung, MDFontana, CA 923351346398146
- Shant Kalanjian, MDFontana, CA 923351942377841
- Ronald Lugo, MDFontana, CA 923351972670883
Common questions
What is Santiago Lopez's NPI number?
Santiago Lopez's National Provider Identifier (NPI) is 1104489897, issued on Apr 17, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Santiago Lopez located?
The NPPES record lists a practice address at 9961 Sierra Ave, Fontana, CA, 92335. Phone: (833) 574-2273. Providers update this record themselves, so call before visiting.
How can I verify Santiago Lopez's license?
NPPES lists California license number 184318, 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 Santiago Lopez prescribe under Medicare Part D?
In 2024, Santiago Lopez had 357 Medicare Part D claims for 224 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.