William Chung, M.D.
Internal Medicine Physician · San Francisco, CA
William Chung, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1831204486, issued on Aug 21, 2006. Check the license (California A51482, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Chung
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A51482 CA
Self-reported in NPPES; status is on the state search - Practice location
- 728 Pacific Ave, San Francisco, CA 94133
- Phone
- (415) 986-2239
- Enumerated
- Aug 21, 2006
- Entity
- Type 1 · individual
Also registered at 728 Pacific Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edward Chan, M.D.Internal Medicine Physician1033155213
- Celeste Chang, MD, FACPNephrology Physician1245633825
- Kenneth Chang, MDInternal Medicine Physician1609832724
- Jennifer Chin, MS, OTR/LOccupational Therapist1174112312
- Robert Choy, DPMPodiatrist1831148618
- Paul Chu, M.D.Family Medicine Physician1215965355
Verify William Chung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A51482Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
29% more Medicare Part D claims than the average internal medicine physician in 2024
3,595 Medicare Part D claims for 296 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Losartan Potassium456 claims
- Amlodipine Besylate293 claims
- Atorvastatin Calcium249 claims
- Simvastatin180 claims
- Metformin Hcl136 claims
- Carvedilol129 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: $84.97
4 payments, mostly food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 65,274 providers of this specialty with any payment received $2,536.66 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Chinese Hospital AssociationDaly City, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
1,593 internal medicine physician records list a San Francisco practice address
They are 1,593 of the 38,143 NPPES records with a San Francisco practice address, and 20,403 internal medicine physician records in California.
All 1,593 in San Francisco → All 20,403 in California → Every provider in San Francisco →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is William Chung, M.D.'s NPI number?
William Chung, M.D.'s National Provider Identifier (NPI) is 1831204486, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Chung, M.D. located?
The NPPES record lists a practice address at 728 Pacific Ave, San Francisco, CA, 94133. Phone: (415) 986-2239. Providers update this record themselves, so call before visiting.
How can I verify William Chung, M.D.'s license?
NPPES lists California license number A51482, 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 William Chung, M.D. prescribe under Medicare Part D?
In 2024, William Chung, M.D. had 3,595 Medicare Part D claims for 296 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.