Helen Zukin-O'Callaghan
Gynecology Physician · San Jose, CA
Helen Zukin-O'Callaghan is a gynecology physician with a practice address in San Jose, California, and NPI 1578144143, issued on Apr 15, 2021. Check the license (California A199431, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Helen Zukin-O'Callaghan
- Primary taxonomy
- Gynecology Physician 207VG0400X
- License number
- A199431 CA
Self-reported in NPPES; status is on the state search - Practice location
- 751 S Bascom Ave, San Jose, CA 95128
- Phone
- (805) 450-3279
- Enumerated
- Apr 15, 2021
- Record last updated
- Aug 14, 2025
- Medicare enrollment
- Enrolled (PECOS I20250828005434); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gynecology physician records → All 369 in California → Look up another NPI →
Also registered at 751 S Bascom Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cherine Abu-Eid, MDAnesthesiology Physician1033173307
- Pallavi AcharyaClinical Social Worker1154807873
Verify Helen Zukin-O'Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A199431Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average gynecology physician in 2024
16 Medicare Part D claims, against an average of 299 among the 1,919 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
- County OF Santa ClaraSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Helen Zukin-O'Callaghan among 369 gynecology physician records in California
Helen Zukin-O'Callaghan is one of 369 gynecology physician records with a practice address in California. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 98% of them.
- NPI issued2021 · 98% of these records are older, 1% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2021 · median 1995 among the 141 with a school on file
- Record last updated2025 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VG0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecology Physician providers in California
There are 369 gynecology physician records in California.
All 369 in California → Every provider in San Jose → Gynecology Physician nationwide →
The 8 gynecology physician records with the nearest ZIP codes
- Joy Brown, MDSan Jose, CA 951281841269461
- Elizabeth Buescher, MDSan Jose, CA 951281033382346
- Evangelia Lazaris, MDSan Jose, CA 951281003376831
- Steven Batanides, MDSan Jose, CA 951291194897298
- Carole Cook, M.D.San Jose, CA 951241710003850
- Carl Keene, MDSan Jose, CA 951321902978653
- Mary Christine Suarez, M.D.San Jose, CA 951241144268202
- David Goldstein, M.D.San Jose, CA 951341346294089
Common questions
What is Helen Zukin-O'Callaghan's NPI number?
Helen Zukin-O'Callaghan's National Provider Identifier (NPI) is 1578144143, issued on Apr 15, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Helen Zukin-O'Callaghan located?
The NPPES record lists a practice address at 751 S Bascom Ave, San Jose, CA, 95128. Phone: (805) 450-3279. Providers update this record themselves, so call before visiting.
How can I verify Helen Zukin-O'Callaghan's license?
NPPES lists California license number A199431, 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 Helen Zukin-O'Callaghan prescribe under Medicare Part D?
In 2024, Helen Zukin-O'Callaghan had 16 Medicare Part D claims; the average among gynecology physician prescribers was 299. 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.