Winnie Lam, DO
Emergency Medicine Physician · Stockton, CA
Winnie Lam, DO is an emergency medicine physician with a practice address in Stockton, California, and NPI 1205576410, issued on Mar 29, 2022. Check the license (California 21878, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Winnie Lam
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 21878 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 N California St, Stockton, CA 95204
- Phone
- (209) 547-7146
- Enumerated
- Mar 29, 2022
- Record last updated
- Sep 10, 2024
- Medicare enrollment
- Enrolled (PECOS I20240920003517); 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 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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- Nariman AbediniPediatrics Physician1780260190
- 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 Winnie Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 21878Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average emergency medicine physician in 2024
83 Medicare Part D claims for 60 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin12 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
- Emergency Physicians Associates San Jose PCSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Winnie Lam among 7,751 emergency medicine physician records in California
Winnie Lam, DO 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 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2022 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 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
- Louis Marquet, D.O.Stockton, CA 952041083976286
Common questions
What is Winnie Lam, DO's NPI number?
Winnie Lam, DO's National Provider Identifier (NPI) is 1205576410, issued on Mar 29, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Winnie Lam, DO located?
The NPPES record lists a practice address at 1800 N California St, Stockton, CA, 95204. Phone: (209) 547-7146. Providers update this record themselves, so call before visiting.
How can I verify Winnie Lam, DO's license?
NPPES lists California license number 21878, 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 Winnie Lam, DO prescribe under Medicare Part D?
In 2024, Winnie Lam, DO had 83 Medicare Part D claims for 60 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.