Oshmyansky was born in
Denver,
Colorado into a Jewish family of immigrants from the Soviet Union and grew up in
Littleton, Colorado, about 9 miles south of Denver. He attended
Dakota Ridge High School in Littleton. Oshmyansky attended the
University of Colorado Boulder, graduating at the age of 18 and majoring in
biochemistry. He then attended
Duke University for
medicine. He also completed a
DPhil (
PhD) in
mathematics at
St. Cross College,
University of Oxford as a
Marshall Scholar. He completed a surgical internship at
Harvard Medical School /
Brigham and Women’s Hospital and then a residency in
diagnostic radiology followed by a
pediatric radiology fellowship at
Johns Hopkins Hospital. While in residency, he attended
night school at
UB School of Law for the 2013–2014 school year out of personal interest. In 2018, he founded Osh Affordable Pharmaceuticals and shortly after, sent
Mark Cuban a
cold email asking him to invest. Cuban instead decided to financially back the entire company, and the name was changed to Mark Cuban Cost Plus Drug Company (MCCPDC), or more simply
Cost Plus Drugs. He is affiliated with a number of medical institutions, such as St. Francis Hospital in
Wilmington,
Delaware and
Atrium Health Wake Forest Baptist in
Winston-Salem,
North Carolina. == Honors ==