William Stephen Chung, M.D.
Cardiovascular Disease Physician · San Francisco, CA
William Stephen Chung, M.D. is a cardiovascular disease 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 Stephen Chung
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- 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
- Record last updated
- Jun 26, 2026
- Fax
- (415) 986-2237
- Medicaid ID
- A514822 CA
- Medicare enrollment
- Enrolled (PECOS I20070406000161); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 728 Pacific Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jennifer Chin, MS, OTR/LOccupational Therapist1174112312
- Robert Choy, DPMPodiatrist1831148618
- Paul Chu, M.D.Family Medicine Physician1215965355
Verify William Stephen 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
17% more Medicare Part D claims than the average cardiovascular disease physician in 2024
3,595 Medicare Part D claims for 296 beneficiaries, against an average of 3,078 among the 20,728 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; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 16,686 providers of this specialty with any payment received $3,819.56 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.
Bills Medicare through one group practice
- Chinese Hospital AssociationDaly City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Stephen Chung among 2,574 cardiovascular disease physician records in California
William Stephen Chung, M.D. is one of 2,574 cardiovascular disease 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1984 · median 1999 among the 1,742 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in San Francisco → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Randall Low, MDSan Francisco, CA 941331255368726
- Michael Nagel, M.D.San Francisco, CA 941331548226368
- Hong Zheng, D.OSan Francisco, CA 941331861796807
- Theodore Abraham, M.D.San Francisco, CA 941431467427096
- Maria Abraham, M.D.San Francisco, CA 941431669436960
- Phoebe Ashley, M.D.San Francisco, CA 941431740288901
- Michael Blum, MDSan Francisco, CA 941431972568889
- Elias Botvinick, MDSan Francisco, CA 941431760440465
Common questions
What is William Stephen Chung, M.D.'s NPI number?
William Stephen 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 Stephen 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 Stephen 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 Stephen Chung, M.D. prescribe under Medicare Part D?
In 2024, William Stephen Chung, M.D. had 3,595 Medicare Part D claims for 296 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.