Viet M. Lam, MD
Hospitalist Physician · San Rafael, CA
Viet M. Lam, MD is a hospitalist physician with a practice address in San Rafael, California, and NPI 1942384011, issued on Oct 25, 2006. Check the license (California A82021, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Viet M. Lam
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A82021 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 444-2000
- Enumerated
- Oct 25, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A820210 CA
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Scott Adelman, MDCardiovascular Disease Physician1396829362
- Navid AfrahPhysical Therapist1275997017
- Omar Ahmed, PHARMDAmbulatory Care Pharmacist1285254037
- Mary Air, M.D.Physical Medicine & Rehabilitation Physician1376772913
- Tarik Alagha, MDInternal Medicine Physician1740869676
- Paul Alpert, MDUrology Physician1417031402
Verify Viet M. Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A82021Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average hospitalist physician in 2024
1,694 Medicare Part D claims for 87 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Levothyroxine Sodium106 claims
- Atorvastatin Calcium96 claims
- Duloxetine Hcl63 claims
- Quetiapine Fumarate63 claims
- Furosemide60 claims
- Sertraline Hcl53 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.
Viet M. Lam among 3,099 hospitalist physician records in California
Viet M. Lam, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2021 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Rafael → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gregory Arent, MDSan Rafael, CA 949031245314210
- Ingrid Brennan, MDSan Rafael, CA 949031518046655
- Anne-Maree Cantwell, MDSan Rafael, CA 949031679657670
- Siraphob Chansangavej, MDSan Rafael, CA 949031386268027
- Jeffrey Lovold, MDSan Rafael, CA 949031376627356
- Robert Lowell, MDSan Rafael, CA 949031053495051
- Stephen Mizroch, MDSan Rafael, CA 949031225112394
- Peter Reidy, MDSan Rafael, CA 949031013113257
Common questions
What is Viet M. Lam, MD's NPI number?
Viet M. Lam, MD's National Provider Identifier (NPI) is 1942384011, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Viet M. Lam, MD located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 444-2000. Providers update this record themselves, so call before visiting.
How can I verify Viet M. Lam, MD's license?
NPPES lists California license number A82021, 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 Viet M. Lam, MD prescribe under Medicare Part D?
In 2024, Viet M. Lam, MD had 1,694 Medicare Part D claims for 87 beneficiaries; the average among hospitalist physician prescribers was 521. 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.