Wan Joon Kim, M.D.
Obstetrics & Gynecology Physician · Union City, CA
Wan Joon Kim, M.D. is an obstetrics & gynecology physician with a practice address in Union City, California, and NPI 1235218926, issued on Nov 3, 2006. Check the license (California A78825, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Wan Joon Kim
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A78825 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3555 Whipple RD, Union City, CA 94587
- Phone
- (510) 454-1000
- Enumerated
- Nov 3, 2006
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A788250 CA
- Medicare enrollment
- Enrolled (PECOS I20110119000984); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 3555 Whipple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jacqueline Arroyo, JACQUELINE ARROYOPsychologist1275689531
Verify Wan Joon Kim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78825Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
265 Medicare Part D claims for 107 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Estradiol59 claims
- Nystatin43 claims
- Triamcinolone Acetonide39 claims
- Acyclovir12 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
- Permanente Medical Group IncUnion City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Wan Joon Kim among 5,088 obstetrics & gynecology physician records in California
Wan Joon Kim, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1995 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 obstetrics & gynecology physician records list a practice address in Union City
They are 13 of the 1,006 NPPES records with a practice address in Union City, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Union City → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Joseph Bachicha, M.D.Union City, CA 945871023180775
- Bennie Brown, MDUnion City, CA 945871750379509
- Charlotte Burke, M.D.Union City, CA 945871932387727
- Winnie Cheung, M.D.Union City, CA 945871124107271
- Harita DevireddyUnion City, CA 945871831480177
- Jennifer Isaacs, M.D.Union City, CA 945871972653798
- Mark Jacobs, M.D.San Leandro, CA 945871679533186
- Abigail Justiss, MDUnion City, CA 945871144664624
Common questions
What is Wan Joon Kim, M.D.'s NPI number?
Wan Joon Kim, M.D.'s National Provider Identifier (NPI) is 1235218926, issued on Nov 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Wan Joon Kim, M.D. located?
The NPPES record lists a practice address at 3555 Whipple RD, Union City, CA, 94587. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.
How can I verify Wan Joon Kim, M.D.'s license?
NPPES lists California license number A78825, 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 Wan Joon Kim, M.D. prescribe under Medicare Part D?
In 2024, Wan Joon Kim, M.D. had 265 Medicare Part D claims for 107 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.