William Wang, M.D.
Internal Medicine Physician · Los Angeles, CA
William Wang, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1518105022, issued on Jan 22, 2009. Check the license (California A103764, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Wang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A103764 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2020 Zonal Ave, Los Angeles, CA 90089
- Phone
- (323) 226-7644
- Enumerated
- Jan 22, 2009
- Record last updated
- Nov 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20091019000284); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 2006
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2020 Zonal Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Pankaj Bahl, M.D.Internal Medicine Physician1548450489
- Sumati Bansal, D.O.Internal Medicine Physician1881854651
- Rogelio Bravo, M.D.Internal Medicine Physician1295919009
- Alev Brown, M.D.Internal Medicine Physician1689975781
- Blake Brown, M.D.Student in an Organized Health Care Education/Training Program1861752156
Verify William Wang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103764Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
33 Medicare Part D claims for 15 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- Southern California Permanente Medical GroupDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Wang among 17,696 internal medicine physician records in California
William Wang, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pankaj Bahl, M.D.Los Angeles, CA 900891548450489
- Sumati Bansal, D.O.Los Angeles, CA 900891881854651
- Rogelio Bravo, M.D.Los Angeles, CA 900891295919009
- Kevin Kwak, M.D.Los Angeles, CA 900891275759425
- Sarita Mohanty, MDLos Angeles, CA 900891730286683
- Vidya Narayan, M.DLos Angeles, CA 900891396943254
- Hoa Phan, D.O.Los Angeles, CA 900891295919686
- Jesse Sammons, MDLos Angeles, CA 900891871753707
Common questions
What is William Wang, M.D.'s NPI number?
William Wang, M.D.'s National Provider Identifier (NPI) is 1518105022, issued on Jan 22, 2009. An NPI identifies a provider in billing; it is not a license.
Where is William Wang, M.D. located?
The NPPES record lists a practice address at 2020 Zonal Ave, Los Angeles, CA, 90089. Phone: (323) 226-7644. Providers update this record themselves, so call before visiting.
How can I verify William Wang, M.D.'s license?
NPPES lists California license number A103764, 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 Wang, M.D. prescribe under Medicare Part D?
In 2024, William Wang, M.D. had 33 Medicare Part D claims for 15 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.
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.