NPPES file of Aug 9, 2026

Wai-Lam Chan, M.D.

Family Medicine Physician · San Francisco, CA

Wai-Lam Chan, M.D. is a family medicine physician with a practice address in San Francisco, California, and NPI 1891791877, issued on Jun 23, 2005. Check the license (California A74856, 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
1891791877
Name
Wai-Lam Chan
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A74856 CA
Self-reported in NPPES; status is on the state search
Practice location
1431 Noriega St, San Francisco, CA 94122
Phone
(415) 759-3777
Enumerated
Jun 23, 2005
Record last updated
Jun 29, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(415) 759-6368
Medicaid ID
0159135 CA
Medicare enrollment
Enrolled (PECOS I20100528000560); accepts Medicare assignment
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 1431 Noriega St

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

  1. Victor Kwok, MDGeriatric Medicine (Internal Medicine) Physician1497856827
  2. Lydia LeeNurse Practitioner1073272555
  3. Edmond Liu, M.D.Family Medicine Physician1922184019
  4. Hans Yu, D.O.Internal Medicine Physician1811089303
  5. Bonnie Yuen, FNP-C, MSN, MNFamily Nurse Practitioner1497680672

Verify Wai-Lam Chan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A74856    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

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98% more Medicare Part D claims than the average family medicine physician in 2024

7,007 Medicare Part D claims for 491 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. 68 claims were for opioids.

  1. Wai-Lam Chan7,007
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium966 claims
  2. Amlodipine Besylate340 claims
  3. Rosuvastatin Calcium310 claims
  4. Alendronate Sodium229 claims
  5. Metformin Hcl228 claims
  6. Metoprolol Succinate208 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: $495.08

21 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. 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. Wai-Lam Chan$495.08
  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.

Wai-Lam Chan among 17,133 family medicine physician records in California

Wai-Lam Chan, 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 94% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated1997 · median 2005 among the 10,652 with a school on file
  • Record last updated2010 · 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

  1. Frank Chen, M.D.San Francisco, CA 941221104010586
  2. Aaron Del Tredici, MDSan Francisco, CA 941221891822888
  3. Annette Enriquez, M.D, PH.D.San Francisco, CA 941221770693863
  4. Winston Goh, MDSan Francisco, CA 941221992930242
  5. Lisa Golden, MDSan Francisco, CA 941221699892067
  6. Elizabeth Johnson, MDSan Francisco, CA 941221558493585
  7. Wai-Hang Lam, M.D.San Francisco, CA 941221063669224
  8. Maria Lau, D.O.San Francisco, CA 941221043575491

Common questions

What is Wai-Lam Chan, M.D.'s NPI number?

Wai-Lam Chan, M.D.'s National Provider Identifier (NPI) is 1891791877, issued on Jun 23, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Wai-Lam Chan, M.D. located?

The NPPES record lists a practice address at 1431 Noriega St, San Francisco, CA, 94122. Phone: (415) 759-3777. Providers update this record themselves, so call before visiting.

How can I verify Wai-Lam Chan, M.D.'s license?

NPPES lists California license number A74856, 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 Wai-Lam Chan, M.D. prescribe under Medicare Part D?

In 2024, Wai-Lam Chan, M.D. had 7,007 Medicare Part D claims for 491 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.