NPPES file of Aug 9, 2026

Tien H. Lam, M.D.

Family Medicine Physician · Walnut Creek, CA

Tien H. Lam, M.D. is a family medicine physician with a practice address in Walnut Creek, California, and NPI 1710917315, issued on Jul 3, 2006. Check the license (California A75397, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1710917315
Name
Tien H. Lam
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A75397 CA
Self-reported in NPPES; status is on the state search
Practice location
1450 Treat Blvd, Walnut Creek, CA 94597
Phone
(925) 296-9720
Enumerated
Jul 3, 2006
Record last updated
Apr 2, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(925) 296-9034
Medicaid ID
00A753970 CA
Medicare enrollment
Enrolled (PECOS I20031218001023); accepts Medicare assignment
Medical or professional school
Saint Louis University School Of Medicine, 1999
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 1450 Treat Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lauren Ables, D.O.Family Medicine Physician1710413299
  2. Andrea Agcaoili, D.O.Family Medicine Physician1265775035
  3. Sonal Aggarwal, MDFamily Medicine Physician1336336411
  4. Deborah Arce, M.D.Internal Medicine Physician1841215605
  5. Cynthia AshbrookAllergy & Immunology Physician1386786408
  6. Chanda Banwat, M.D.Internal Medicine Physician1750584389

Verify Tien H. Lam in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A75397    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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16% more Medicare Part D claims than the average family medicine physician in 2024

4,097 Medicare Part D claims for 431 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 67 claims were for opioids.

  1. Tien Lam4,097
  2. Specialty average3,544

Most prescribed

  1. Rosuvastatin Calcium458 claims
  2. Atorvastatin Calcium409 claims
  3. Amlodipine Besylate256 claims
  4. Levothyroxine Sodium246 claims
  5. Losartan Potassium151 claims
  6. Metformin Hcl Er137 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.

Industry payments in 2024: $845.62

37 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tien Lam$845.62
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. John Muir Physician NetworkWalnut Creek, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tien H. Lam among 17,133 family medicine physician records in California

Tien H. 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
  • Graduated1999 · median 2005 among the 10,652 with a school on file
  • Record last updated2014 · 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).

116 family medicine physician records list a practice address in Walnut Creek

They are 116 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in Walnut Creek → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Russell Alpert, M.D.Walnut Creek, CA 945971235182544
  2. John Cho, M.D.Walnut Creek, CA 945971609816107
  3. Grace Chou, M.D.Walnut Creek, CA 945971053309369
  4. Robert Eidus, MDWalnut Creek, CA 945971215901871
  5. Lance Gee, M.D.Walnut Creek, CA 945971497731665
  6. Deborah Greer, M.D.Walnut Creek, CA 945971003851858
  7. Lawren Hicks, M.D.Walnut Creek, CA 945971619912680
  8. Seigfred Jalalon, M.D.Walnut Creek, CA 945971043231038

Common questions

What is Tien H. Lam, M.D.'s NPI number?

Tien H. Lam, M.D.'s National Provider Identifier (NPI) is 1710917315, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Tien H. Lam, M.D. located?

The NPPES record lists a practice address at 1450 Treat Blvd, Walnut Creek, CA, 94597. Phone: (925) 296-9720. Providers update this record themselves, so call before visiting.

How can I verify Tien H. Lam, M.D.'s license?

NPPES lists California license number A75397, 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 Tien H. Lam, M.D. prescribe under Medicare Part D?

In 2024, Tien H. Lam, M.D. had 4,097 Medicare Part D claims for 431 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.