Jennifer Nehama Isaacs, M.D.
Obstetrics & Gynecology Physician · Union City, CA
Jennifer Nehama Isaacs, M.D. is an obstetrics & gynecology physician with a practice address in Union City, California, and NPI 1972653798, issued on Jan 12, 2007. Check the license (California A86356, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer Nehama Isaacs
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A86356 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
- Jan 12, 2007
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- 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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Verify Jennifer Nehama Isaacs in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86356Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
117 Medicare Part D claims for 39 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Estradiol34 claims
- Yuvafem14 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.
Jennifer Nehama Isaacs among 5,088 obstetrics & gynecology physician records in California
Jennifer Nehama Isaacs, 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 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 38% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- 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
- Mark Jacobs, M.D.San Leandro, CA 945871679533186
- Abigail Justiss, MDUnion City, CA 945871144664624
- Wan Kim, M.D.Union City, CA 945871235218926
Common questions
What is Jennifer Nehama Isaacs, M.D.'s NPI number?
Jennifer Nehama Isaacs, M.D.'s National Provider Identifier (NPI) is 1972653798, issued on Jan 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Nehama Isaacs, 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 Jennifer Nehama Isaacs, M.D.'s license?
NPPES lists California license number A86356, 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 Jennifer Nehama Isaacs, M.D. prescribe under Medicare Part D?
In 2024, Jennifer Nehama Isaacs, M.D. had 117 Medicare Part D claims for 39 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.