NPPES file of Aug 9, 2026

Chuk W. Kwan, M.D.

Internal Medicine Physician · San Francisco, CA

Chuk W. Kwan, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1336101500, issued on Apr 4, 2006. Check the license (California G32238, 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
1336101500
Name
Chuk W. Kwan
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
G32238 CA
Self-reported in NPPES; status is on the state search
Practice location
929 Clay St, San Francisco, CA 94108
Phone
(415) 398-5926
Enumerated
Apr 4, 2006
Record last updated
Dec 11, 2016 (not updated in 10 years: call before relying on the address or phone)
Fax
(415) 398-6956
Medicaid ID
00G322380 CA
Medicare enrollment
Enrolled (PECOS I20090204000663); accepts Medicare assignment
Medical or professional school
University Of California, San Francisco School Of Medicine, 1975
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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Also registered at 929 Clay St

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

  1. Mai-Sie Chan, MDInternal Medicine Physician1326136557
  2. Clifford Chang, O.D.Optometrist1558539007
  3. Clifford Chew, MDOtolaryngology Physician1215036066
  4. Raymond Fay, MDUrology Physician1003808338
  5. Gustin Ho, M.D.Internal Medicine Physician1437189966
  6. Wenwu Jin, M.D., PH.D.Urology Physician1003051780

Verify Chuk W. Kwan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G32238    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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7% more Medicare Part D claims than the average internal medicine physician in 2024

3,406 Medicare Part D claims for 422 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. Chuk Kwan3,406
  2. Specialty average3,176

Most prescribed

  1. Amlodipine Besylate432 claims
  2. Losartan Potassium358 claims
  3. Atorvastatin Calcium286 claims
  4. Eliquis263 claims
  5. Metoprolol Succinate251 claims
  6. Lovastatin125 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

  1. Chinese Hospital AssociationSan Francisco, CA

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

1,318 internal medicine physician records list a practice address in San Francisco

They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.

All 1,318 in San Francisco → All 17,696 in California → Every provider in San Francisco →

Other internal medicine physician records in California

  1. Jacob Aaron, MDSan Francisco, CA1407202518
  2. Alistair Aaronson, MDStanford, CA1457628760
  3. Jose Abad., MDSacramento, CA1144607219
  4. Donna Abare, MDOakland, CA1386722155
  5. Marce AbareScotts Valley, CA1457744708
  6. Samuel Abarte, M.D.Chula Vista, CA1578535498
  7. Alexander Abary, MDLong Beach, CA1104995919
  8. Luba Abascal, MDSan Francisco, CA1023180874
  9. Michael Abate, MDSacramento, CA1548248131
  10. Wali Abawi, D.O.Joshua Tree, CA1104362268

Common questions

What is Chuk W. Kwan, M.D.'s NPI number?

Chuk W. Kwan, M.D.'s National Provider Identifier (NPI) is 1336101500, issued on Apr 4, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Chuk W. Kwan, M.D. located?

The NPPES record lists a practice address at 929 Clay St, San Francisco, CA, 94108. Phone: (415) 398-5926. Providers update this record themselves, so call before visiting.

How can I verify Chuk W. Kwan, M.D.'s license?

NPPES lists California license number G32238, 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 Chuk W. Kwan, M.D. prescribe under Medicare Part D?

In 2024, Chuk W. Kwan, M.D. had 3,406 Medicare Part D claims for 422 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.