Agnieszka Anna Wisniewska, M.D.
Psychiatry Physician · Union City, CA
Agnieszka Anna Wisniewska, M.D. is a psychiatry physician with a practice address in Union City, California, and NPI 1659501708, issued on Jul 23, 2009. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Agnieszka Anna Wisniewska
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 255922 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3553 Whipple RD, Union City, CA 94587
- Phone
- (510) 454-1000
- Enumerated
- Jul 23, 2009
- Record last updated
- Feb 11, 2022
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 3553 Whipple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jaishree Acharya, M.D.Internal Medicine Physician1053334920
- Marie Agleham, MDAdult Medicine Physician1649298209
- Muhammad Aleem, M.D.Internal Medicine Physician1952480006
- Eleanor Anderson-Williams, M.D.Internal Medicine Physician1164576815
- Kristina Austin, M.D.Ophthalmology Physician1417007238
- Vijaya Basawaprasad, M.D.Internal Medicine Physician1588736326
Verify Agnieszka Anna Wisniewska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average psychiatry physician in 2024
152 Medicare Part D claims for 20 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Buprenorphine-Naloxone71 claims
- Fluoxetine Hcl15 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.
Agnieszka Anna Wisniewska among 8,673 psychiatry physician records in California
Agnieszka Anna Wisniewska, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 57% of them.
- NPI issued2009 · 57% of these records are older, 40% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Union City → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Aliya Bakr, M.D.Union City, CA 945871780791038
- Shuja Jafar-Ali, M.D.Union City, CA 945871548348394
- Xiu Lowe, M.D.Union City, CA 945871043398894
- Jacqueline Magno Lagasca, M.D.Union City, CA 945871972675726
- Steve Manitsas, MDUnion City, CA 945871720166580
- Anthony Ret, M.D.Union City, CA 945871407934250
- Michael Sands, M.D.Union City, CA 945871033298732
- Mona Trivedi, M.D.Union City, CA 945871689781924
Common questions
What is Agnieszka Anna Wisniewska, M.D.'s NPI number?
Agnieszka Anna Wisniewska, M.D.'s National Provider Identifier (NPI) is 1659501708, issued on Jul 23, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Agnieszka Anna Wisniewska, M.D. located?
The NPPES record lists a practice address at 3553 Whipple RD, Union City, CA, 94587. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.
How can I verify Agnieszka Anna Wisniewska, M.D.'s license?
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 Agnieszka Anna Wisniewska, M.D. prescribe under Medicare Part D?
In 2024, Agnieszka Anna Wisniewska, M.D. had 152 Medicare Part D claims for 20 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.