John Z. Wang, M.D., PH.D.
Internal Medicine Physician · West Covina, CA
John Z. Wang, M.D., PH.D. is an internal medicine physician with a practice address in West Covina, California, and NPI 1285747931, issued on Aug 16, 2006. Check the license (California A67229, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Z. Wang
- Credential
- M.D., PH.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A67229 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1115 S Sunset Ave Ste 200, West Covina, CA 91790
- Phone
- (626) 732-8390
- Enumerated
- Aug 16, 2006
- Record last updated
- Jul 11, 2025
- Fax
- (626) 732-8399
- Medicaid ID
- 00A672290 CA
- Medicare enrollment
- Enrolled (PECOS I20050726001260); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1115 S Sunset Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michelle El-Hajjaoui, DOHematology & Oncology Physician1184010662
- Luis Garcia AyalaFamily Medicine Physician1750867255
Verify John Z. Wang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A67229Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,476 Medicare Part D claims for 211 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Atorvastatin Calcium314 claims
- Amlodipine Besylate297 claims
- Losartan Potassium180 claims
- Levothyroxine Sodium148 claims
- Metformin Hcl113 claims
- Lisinopril112 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.
John Z. Wang among 17,696 internal medicine physician records in California
John Z. Wang, M.D., PH.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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1989 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
23 internal medicine physician records list a practice address in West Covina
They are 23 of the 2,450 NPPES records with a practice address in West Covina, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in West Covina → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amitabh Chauhan, M.D.West Covina, CA 917901619925948
- Johny Cu, MDWest Covina, CA 917901336223569
- Seung Sue Cua, MDWest Covina, CA 917901063513661
- Ziad Dabuni, M.D.West Covina, CA 917901851349187
- Lina Dela Cruz, MDWest Covina, CA 917901952489858
- Anil Gupta, MDWest Covina, CA 917901538182407
- Cesar Jimenez, MDWest Covina, CA 917901114099942
- Ruth Karunananthan, M.D.West Covina, CA 917901922057256
Common questions
What is John Z. Wang, M.D., PH.D.'s NPI number?
John Z. Wang, M.D., PH.D.'s National Provider Identifier (NPI) is 1285747931, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Z. Wang, M.D., PH.D. located?
The NPPES record lists a practice address at 1115 S Sunset Ave Ste 200, West Covina, CA, 91790. Phone: (626) 732-8390. Providers update this record themselves, so call before visiting.
How can I verify John Z. Wang, M.D., PH.D.'s license?
NPPES lists California license number A67229, 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 John Z. Wang, M.D., PH.D. prescribe under Medicare Part D?
In 2024, John Z. Wang, M.D., PH.D. had 2,476 Medicare Part D claims for 211 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.