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

Individual provider Obstetrics & Gynecology Physician · NPI 1841232642

Dr. Natalie Semenyuk, MD practises Obstetrics/Gynecology in East Setauket, New York. Qualified in 1988, 38 years ago. Practices with Montefiore Medical Center, a 2,796-clinician group. Licensed in New York.

Years since qualifying
38
Licensed in
NY
In the registry since
2006
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

6 Technology Dr
East Setauket, NY 11733-4047
Phone: (631) 444-4686
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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 230610 (NY)

Record details

NPI number1841232642
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice Montefiore Medical Center — 2796 clinicians
Accepts Medicare assignment Not indicated

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 patients73
Services billed 164 a service is one billed item, such as a visit, a test or a procedure
Average patient age65

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Montefiore Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2796 clinicians in the practice; 12 are shown here.

Other providers in East Setauket