Mary Koshy was brought up in Sarasota, Florida and received her undergraduate training at Cornell University where she graduated Suma Cum Laude. She received her medical school training at the University of Florida College of Medicine in Gainesville, Florida.

She then went on to do her Internship in Internal Medicine at Emory University in Atlanta, GA and stayed on to complete her residency in Radiation Oncology where she served as Chief Resident in her final year. She stayed on at Emory for the following year on faculty as a Clinical Instructor and then served as Assistant Professor in Radiation Oncology at Baylor College of Medicine in Houston for another 2 years before returning to Florida.

Dr. Koshy is a member of numerous organizations, including the American Society for Therapeutic Radiology and Oncology, the American College of Radiology and The American Society of Clinical Oncology.

She has authored several papers on IMRT, pediatric tumors, gastrointestinal tumors and PET-CT imagines. She has been recipient of the ARS Young Oncologist Travel Award, RSNA Roentgen Research Award and the AAWR National Resident Award.

She maintains a strong interest in clinical research, and has a special interest in Intensity Modulated Radiotherapy, PET-CT and gastrointestinal oncology.

She is Board Certified in Radiation Oncology by the American Board of Radiology. She will be primarily based at Cancer Center of Putnam.