Margarita Santiago Martinez, MD
Emergency Medicine Physician · Los Angeles, CA
Margarita Santiago Martinez, MD is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1447605407, issued on Apr 27, 2016. Check the license (California A142723, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Margarita Santiago Martinez
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A142723 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N State St, Los Angeles, CA 90089
- Phone
- (323) 226-6937
- Enumerated
- Apr 27, 2016
- Record last updated
- Jun 27, 2025
- Fax
- (323) 226-8101
- Medicare enrollment
- Enrolled (PECOS I20180521002202); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Human Medicine, 2014
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1200 N State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margarita Santiago Martinez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142723Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average emergency medicine physician in 2024
138 Medicare Part D claims for 106 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Cephalexin25 claims
- Hydrocodone-Acetaminophen20 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): 92.2 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
- Emergency Specialist Physicians Medical Associates, IncTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margarita Santiago Martinez among 7,751 emergency medicine physician records in California
Margarita Santiago Martinez, MD 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 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2014 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 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 Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Robert AllenLos Angeles, CA 900891528562469
- Eduardo Borquez, M.D.Los Angeles, CA 900891497935134
- Joseph Choi, MD, MPHLos Angeles, CA 900891902087497
- David Diller, M.D.Los Angeles, CA 900891801187398
- Dennis Espitia, M.D.Los Angeles, CA 900891669654380
- David Harrison, M.D.Los Angeles, CA 900891104189000
- Jennifer Huang, D.O.Los Angeles, CA 900891275708588
- Vanessa Kreger, M.D.Los Angeles, CA 900891467849604
Common questions
What is Margarita Santiago Martinez, MD's NPI number?
Margarita Santiago Martinez, MD's National Provider Identifier (NPI) is 1447605407, issued on Apr 27, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Margarita Santiago Martinez, MD located?
The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90089. Phone: (323) 226-6937. Providers update this record themselves, so call before visiting.
How can I verify Margarita Santiago Martinez, MD's license?
NPPES lists California license number A142723, 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 Margarita Santiago Martinez, MD prescribe under Medicare Part D?
In 2024, Margarita Santiago Martinez, MD had 138 Medicare Part D claims for 106 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Margarita Santiago Martinez, MD's MIPS final score?
The 2023 MIPS final score is 92.2 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.