John Ginhsun Wear
Internal Medicine Physician · San Marino, CA
John Ginhsun Wear is an internal medicine physician with a practice address in San Marino, California, and NPI 1255080198, issued on Mar 19, 2022. Check the license (California 20A21491, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Ginhsun Wear
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A21491 CA
Self-reported in NPPES; status is on the state search - Practice location
- 375 Huntington Dr Ste G, San Marino, CA 91108
- Phone
- (626) 441-4231
- Enumerated
- Mar 19, 2022
- Record last updated
- Jul 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20250617003016); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 375 Huntington Dr Ste G
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Derek Cheung, MDInternal Medicine Physician1336671981
- Sonya Ehresmann, M.D.Internal Medicine Physician1750533212
- Ya-Gin Hanna Huang, MDInternal Medicine Physician1265012520
- Jennifer Oh, NPFamily Nurse Practitioner1578968913
Verify John Ginhsun Wear in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A21491Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
226 Medicare Part D claims for 91 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Clopidogrel17 claims
- Atorvastatin Calcium14 claims
- Losartan Potassium11 claims
- Spironolactone11 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
- The Huntington Medical FoundationPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
11 internal medicine physician records list a practice address in San Marino
They are 11 of the 184 NPPES records with a practice address in San Marino, and 17,696 internal medicine physician records in California.
All 11 in San Marino → All 17,696 in California → Every provider in San Marino →
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 John Ginhsun Wear's NPI number?
John Ginhsun Wear's National Provider Identifier (NPI) is 1255080198, issued on Mar 19, 2022. An NPI identifies a provider in billing; it is not a license.
Where is John Ginhsun Wear located?
The NPPES record lists a practice address at 375 Huntington Dr Ste G, San Marino, CA, 91108. Phone: (626) 441-4231. Providers update this record themselves, so call before visiting.
How can I verify John Ginhsun Wear's license?
NPPES lists California license number 20A21491, 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 Ginhsun Wear prescribe under Medicare Part D?
In 2024, John Ginhsun Wear had 226 Medicare Part D claims for 91 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.