Louis John Marquet, D.O.
Emergency Medicine Physician · Stockton, CA
Louis John Marquet, D.O. is an emergency medicine physician with a practice address in Stockton, California, and NPI 1083976286, issued on Jun 13, 2012. Check the license (California 20A14693, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Louis John Marquet
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A14693 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 N California St, Stockton, CA 95204
- Phone
- (209) 943-2000
- Enumerated
- Jun 13, 2012
- Record last updated
- Apr 12, 2022
- Medicare enrollment
- Enrolled (PECOS I20160803002183); accepts Medicare assignment
- Medical or professional school
- Rowan University School Of Osteopathic Medicine, 2012
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1800 N California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Najiba Afzal, MDStudent in an Organized Health Care Education/Training Program1033978572
- Khaja AhmedPharmacist1982241709
- Nabeel Ahmed, MDStudent in an Organized Health Care Education/Training Program1083552780
- Savannah AibayeStudent in an Organized Health Care Education/Training Program1619508553
Verify Louis John Marquet in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14693Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average emergency medicine physician in 2024
458 Medicare Part D claims for 234 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Prednisone33 claims
- Albuterol Sulfate Hfa32 claims
- Ibuprofen30 claims
- Oxycodone Hcl28 claims
- Famotidine20 claims
- Azithromycin18 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
- Permanente Medical Group IncRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Louis John Marquet among 7,751 emergency medicine physician records in California
Louis John Marquet, D.O. 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 2012, is newer than 63% of them.
- NPI issued2012 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2012 · 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 Stockton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Denise Ammon, M.D.Stockton, CA 952041518222876
- Jason Darr, DOStockton, CA 952041699237099
- Douglas Demartinis, MDStockton, CA 952041699797993
- Anatoliy Goltser, MDStockton, CA 952041780903203
- Zachary Haberman, M.D.Stockton, CA 952041831553171
- Samuel Kaplan, MDStockton, CA 952041588168793
- Justin Leach, DOStockton, CA 952041124580527
- Matthew Nottingham, MDStockton, CA 952041962993964
Common questions
What is Louis John Marquet, D.O.'s NPI number?
Louis John Marquet, D.O.'s National Provider Identifier (NPI) is 1083976286, issued on Jun 13, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Louis John Marquet, D.O. located?
The NPPES record lists a practice address at 1800 N California St, Stockton, CA, 95204. Phone: (209) 943-2000. Providers update this record themselves, so call before visiting.
How can I verify Louis John Marquet, D.O.'s license?
NPPES lists California license number 20A14693, 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 Louis John Marquet, D.O. prescribe under Medicare Part D?
In 2024, Louis John Marquet, D.O. had 458 Medicare Part D claims for 234 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.