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

Karen Patricia Seiter, MD

Individual provider Hematology (Internal Medicine) Physician · NPI 1265494124

Karen Patricia Seiter, MD practises Hematology/Oncology in Hawthorne, New York. Graduated from New York Medical College in 1985, 41 years ago. Practices with Nuvance Health Medical Practice CT Inc, a 741-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut.

Years since qualifying
41
Trained at
New York Medical College
Licensed in
CT
In the registry since
2006
Specialties on file
3
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

19 Bradhurst Ave Ste 2100
Hawthorne, NY 10532-2140
Phone: (914) 493-8375
Fax: (914) 347-1832
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 83187 (CT)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 83187 (CT)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 83187 (CT)

Record details

NPI number1265494124
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 5, 2006
Last updated in NPPESOctober 10, 2025
Certification dateOctober 10, 2025

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1985 (41 years in practice)
Group practice Nuvance Health Medical Practice Ct Inc — 741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients210
Services billed 1,438 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $21,578 6 payments
Consulting Fee $9,775 3 payments
Travel and Lodging $5,022 8 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $858 10 payments · 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 Nuvance Health Medical Practice CT Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 741 clinicians in the practice; 12 are shown here.

Other providers in Hawthorne