Flavia E. Kostov, MD

Dr. Kostov earned her medical degree from the Bahian School of Medicine and Public Health in Brazil in 2001. She completed an internal medicine residency at Allegheny General Hospital in Pittsburgh in 2005, followed by a hematology-oncology fellowship at the University of Pittsburgh in 2008. Dr. Kostov is board-certified by the American Board of Internal Medicine with subspecialty certification in medical oncology and hematology.

Dr. Kostov’s grandparents, who are also hematologists, inspired her to work in the same medical field. She is experienced in general and malignant hematology and medical oncology, with particular expertise in breast cancer and lung cancer. She bases her practice on two philosophies: treat others the way you would want to be treated, and do no harm. Dr. Kostov feels that she needs her patients as much as they need her.

Originally from Brazil, Dr. Kostov enjoys Hampton Roads for its water, mild weather, sweet Southern folks and the ability to work for a strong health system. Her favorite activities include exercising, cooking and hanging out with her family. Dr. Kostov is married with two sons.


Riverside Peninsula Cancer Institute and Infusion Center - Williamsburg
120 Kings Way
Williamsburg, VA

Riverside Peninsula Cancer Institute and Infusion Center - Gloucester
7544 Medical Drive
Gloucester, VA

Medical School

Escola Paulista de Medicina


Allegheny General Hospital


University of Pittsburgh School of Medicine

Board Certifications

American Board of Internal Medicine

The Patient Rating score is an average of all responses to care provider-related questions from our leading, independent patient satisfaction research group.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

Provider Listened Carefully


Provider Gave Easy to Understand Instructions


Provider Knew Medical History


Recommend Provider's Office


Provider Spent Enough Time


Patient comments are gathered from our patient satisfaction survey and displayed in their entirety.