Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Thien Gangopadyhay, FNP

Individual provider Family Nurse Practitioner · NPI 1952586232

Thien Gangopadyhay, FNP is a Nurse Practitioner in Oakland, California. Qualified in 2004, 22 years ago. Practices with County of San Mateo, a 316-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
22
Licensed in
CA
In the registry since
2008
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

818 Webster St
Oakland, CA 94607-4220 Not confirmed with CMS for 10 years — call before visiting
Phone: (510) 986-6830
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 15629 (CA)

Record details

NPI number1952586232
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorNo
NPI enumeratedJanuary 4, 2008
Last updated in NPPESOctober 7, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice County Of San Mateo — 316 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $122 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at County of San Mateo

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 316 clinicians in the practice; 12 are shown here.

Other providers in Oakland