Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Thomas Grindberg, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1932595733

Thomas Grindberg, MD practises Obstetrics/Gynecology in Northampton, Massachusetts. Qualified in 2015, 11 years ago. Practices with New York University, a 5,884-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New York.

Years since qualifying
11
Licensed in
MA, NY
In the registry since
2015
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

325B King St
Northampton, MA 01060-2370
Phone: (413) 586-2496
Fax: (413) 923-5557
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 281799 (MA)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 334027 (NY)

Record details

NPI number1932595733
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 9, 2015
Last updated in NPPESMarch 7, 2025
Certification dateMarch 7, 2025

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice New York University — 5884 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 $11 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.

Colleagues at New York University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 5884 clinicians in the practice; 12 are shown here.

Other providers in Northampton