Anselm O. Lam, M.D.
Family Medicine Physician · San Francisco, CA
Anselm O. Lam, M.D. is a family medicine physician with a practice address in San Francisco, California, and NPI 1841386141, issued on Oct 5, 2006. Check the license (California 31127, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anselm O. Lam
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 31127 CA
19516 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1520 Stockton St, San Francisco, CA 94133
- Phone
- (415) 391-9686
- Enumerated
- Oct 5, 2006
- Record last updated
- Feb 28, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (414) 355-8644
- Medicaid ID
- 30876800 WI
- Medicare enrollment
- Enrolled (PECOS I20040913000850); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1974
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1520 Stockton St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mai Abdelnabi, MDRheumatology Physician1013394980
- Sabi Ahmed, M.D.Family Medicine Physician1760630461
- Christine Anne Alvarez, RNRegistered Nurse1740928647
- Alice ChanRegistered Nurse1184408536
- Beverley Chan, PHARM DPharmacist1942750260
- Lily Chan, R.N.Community Health Registered Nurse1073868659
Verify Anselm O. Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 31127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average family medicine physician in 2024
10,711 Medicare Part D claims for 636 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 22 claims were for opioids.
Most prescribed
- Atorvastatin Calcium835 claims
- Metoprolol Succinate519 claims
- Amlodipine Besylate470 claims
- Losartan Potassium455 claims
- Omeprazole345 claims
- Tamsulosin Hcl303 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
- North East Medical ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anselm O. Lam among 17,133 family medicine physician records in California
Anselm O. Lam, M.D. is one of 17,133 family 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1974 · median 2005 among the 10,652 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Francisco → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Julie Baller, MDSan Francisco, CA 941331992832984
- Kwokming ChengSan Francisco, CA 941331124192158
- Paul Chu, M.D.San Francisco, CA 941331215965355
- Richard Huynh, MDSan Francisco, CA 941331386718385
- Jerry Jew, MDSan Francisco, CA 941331083899181
- Chea Leung, M.D.San Francisco, CA 941331881692176
- Rebekah Lewis, M.D.San Francisco, CA 941331366555310
- Lien Luong, MDSan Francisco, CA 941331811038912
Common questions
What is Anselm O. Lam, M.D.'s NPI number?
Anselm O. Lam, M.D.'s National Provider Identifier (NPI) is 1841386141, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Anselm O. Lam, M.D. located?
The NPPES record lists a practice address at 1520 Stockton St, San Francisco, CA, 94133. Phone: (415) 391-9686. Providers update this record themselves, so call before visiting.
How can I verify Anselm O. Lam, M.D.'s license?
NPPES lists California license number 31127, 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 Anselm O. Lam, M.D. prescribe under Medicare Part D?
In 2024, Anselm O. Lam, M.D. had 10,711 Medicare Part D claims for 636 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.