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

Dr. Mark Sieminski, MD

Individual provider Emergency Medicine Physician · NPI 1003057779

Dr. Mark Sieminski, MD is an Emergency Medicine in Cheektowaga, New York. Graduated from University of Virginia School of Medicine in 2005, 21 years ago. Practices with University Emergency Medical Services Inc, a 91-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
21
Trained at
University of Virginia School of Medicine
Licensed in
IL
In the registry since
2009
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

305 Cayuga Rd Ste 190
Cheektowaga, NY 14225-1980
Phone: (716) 580-1813
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 125051569 (IL)

Record details

NPI number1003057779
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 10, 2009
Last updated in NPPESOctober 20, 2009
Mailing address305 Cayuga Rd, Suite 190, Cheektowaga, NY 14225-1980

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice University Emergency Medical Services Inc. — 91 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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