Robert Bob-Man Lam, M.D.
Gastroenterology Physician · Santa Rosa, CA
Robert Bob-Man Lam, M.D. is a gastroenterology physician with a practice address in Santa Rosa, California, and NPI 1487210670, issued on May 14, 2019. Check the license (California A200519, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Bob-Man Lam
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- A200519 CA
63112 CT
Self-reported in NPPES; status is on the state search - Practice location
- 3975 Old Redwood Hwy Ste 152, Santa Rosa, CA 95403
- Phone
- (707) 566-5875
- Enumerated
- May 14, 2019
- Record last updated
- Jun 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20250819003697); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 3975 Old Redwood Hwy Ste 152
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Miguel Garcia Villalpando, DPTPhysical Therapist1801774351
- Stephanie Gleason, DPTPhysical Therapist1376839910
- Amanda Ly, MDPhysical Medicine & Rehabilitation Physician1417410374
- David SimmonsPhysical Therapist1184285991
- Ryan Smith, M.D.Physical Medicine & Rehabilitation Physician1104317262
- Madhavi Vetsa, M.D.Internal Medicine Physician1134349673
Verify Robert Bob-Man Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A200519Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average gastroenterology physician in 2024
104 Medicare Part D claims for 42 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Esomeprazole Magnesium20 claims
- Famotidine15 claims
- Omeprazole14 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 IncSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Bob-Man Lam among 2,140 gastroenterology physician records in California
Robert Bob-Man Lam, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 96% of them.
- NPI issued2019 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2019 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Santa Rosa → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Frank Anderson, MDSanta Rosa, CA 954031487691192
- Runalia Bahar, M.D.Santa Rosa, CA 954031265775092
- Timothy Hurley, MDSanta Rosa, CA 954031831273804
- Aruna Jayaraman, M.D., M.H.S.Santa Rosa, CA 954031306817903
- Zoe Memel, MDSanta Rosa, CA 954031710494158
- Richard Permutt, MDSanta Rosa, CA 954031407930571
- Fathima Suhail, MDSanta Rosa, CA 954031669977195
- Scott Trahms, MDSanta Rosa, CA 954031023192093
Common questions
What is Robert Bob-Man Lam, M.D.'s NPI number?
Robert Bob-Man Lam, M.D.'s National Provider Identifier (NPI) is 1487210670, issued on May 14, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Robert Bob-Man Lam, M.D. located?
The NPPES record lists a practice address at 3975 Old Redwood Hwy Ste 152, Santa Rosa, CA, 95403. Phone: (707) 566-5875. Providers update this record themselves, so call before visiting.
How can I verify Robert Bob-Man Lam, M.D.'s license?
NPPES lists California license number A200519, 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 Robert Bob-Man Lam, M.D. prescribe under Medicare Part D?
In 2024, Robert Bob-Man Lam, M.D. had 104 Medicare Part D claims for 42 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.