Dr. Richard Kosierowski is the Director of Oncology Services for YesCare. Past appointments have included medical director of the North Penn Cancer Program of North Penn Hospital and Fox Chase Cancer Center, and medical director for both Prudential health care and Aetna U.S. health care. Dr. Kosierowski is board certified in internal medicine and medical oncology and is a member of the American Society of Clinical Oncology. He has also served as a site surveyor for the American College of Surgeons' Commission on Cancer. After 20 years in community oncology, he transitioned to correctional medicine, establishing a statewide chemotherapy treatment center and on-site hospice within the walls of a Pennsylvania prison. He currently reviews oncology cases for Yes-Care.