Andy Lam, M.D.
Family Medicine Physician · San Dimas, CA
Andy Lam, M.D. is a family medicine physician with a practice address in San Dimas, California, and NPI 1588043970, issued on May 19, 2015. Check the license (California A145756, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andy Lam
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A145756 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1255 W Arrow Hwy, San Dimas, CA 91773
- Phone
- (833) 574-2273
- Enumerated
- May 19, 2015
- Record last updated
- May 23, 2022
- Medicare enrollment
- Enrolled (PECOS I20181107002417); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1255 W Arrow Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Veena Bhatarakamol, D.O.Family Medicine Physician1073830964
- Christina ChaiPharmacist1346788445
- Cheryl ChanPharmacist1649718792
- Stephanie Chang, D.O.Family Medicine Physician1740387091
- Nghi Dang, D.O.Family Medicine Physician1750657193
- Erin Duncan, ODOptometrist1821191222
Verify Andy Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A145756Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% more Medicare Part D claims than the average family medicine physician in 2024
4,889 Medicare Part D claims for 899 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 68 claims were for opioids.
Most prescribed
- Atorvastatin Calcium439 claims
- Amlodipine Besylate294 claims
- Lisinopril265 claims
- Simvastatin196 claims
- Rosuvastatin Calcium170 claims
- Levothyroxine Sodium167 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 GroupSan Dimas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andy Lam among 17,133 family medicine physician records in California
Andy 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 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 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).
29 family medicine physician records list a practice address in San Dimas
They are 29 of the 942 NPPES records with a practice address in San Dimas, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Dimas → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Norma Bachoura, M.D.San Dimas, CA 917731235191131
- Stephanie Chang, D.O.San Dimas, CA 917731740387091
- Steven Davis, D.O.San Dimas, CA 917731154300978
- Maria Dunton, DOSan Dimas, CA 917731639112386
- Candido Gamez, M.D.San Dimas, CA 917731689625972
- Rosanna Iskander, M.D.San Dimas, CA 917731265500896
- Sabah Kadhium, MDSan Dimas, CA 917731306836770
- Richard Magallon, MDSan Dimas, CA 917731316925530
Common questions
What is Andy Lam, M.D.'s NPI number?
Andy Lam, M.D.'s National Provider Identifier (NPI) is 1588043970, issued on May 19, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Andy Lam, M.D. located?
The NPPES record lists a practice address at 1255 W Arrow Hwy, San Dimas, CA, 91773. Phone: (833) 574-2273. Providers update this record themselves, so call before visiting.
How can I verify Andy Lam, M.D.'s license?
NPPES lists California license number A145756, 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 Andy Lam, M.D. prescribe under Medicare Part D?
In 2024, Andy Lam, M.D. had 4,889 Medicare Part D claims for 899 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.