To make an appointment, call 314-747-7222.
Toll free: 800-600-3606

Washington University board-certified cancer specialists at Siteman Cancer Center collaborate with other Washington University specialists and the dedicated resources of Barnes-Jewish Hospital to provide the highest quality of care for patients with cancer. 

Cancer is many diseases – 80 or more – each with its own characteristics, treatment modality and outcome. Only highly specialized, individualized treatment plans work effectively, and our oncologists are experts in the medical management of a wide range of cancer types. 

Washington University cancer specialists treat:

In addition to the multi-specialty physician treatment team, each patient has the benefit of a designated multidisciplinary team of advanced practice nurses, oncology nurses, social workers, psychologists, psychiatrists, dietitians, home health and hospice specialists. Together with the resources of Barnes-Jewish hospitals, we provide compassionate and supportive care to our patients. 

Andrew Davis, MD

Andrew A. Davis, MD

Cancer (Oncology)
Medical Oncology

Locations:
Gary C. Werths Building at Siteman Cancer Center
Siteman Cancer Center – North County

Faisal Fa’ak, MD

Cancer (Oncology)
Medical Oncology

Locations:
Gary C. Werths Building at Siteman Cancer Center
Siteman Cancer Center – North County

Mary Ellen Flanagan, NP

Cancer (Oncology)
Medical Oncology

Locations:
Siteman Cancer Center – South County
Center for Advanced Medicine Siteman Cancer Center

Ashley Frith

Ashley Frith, MD

Cancer (Oncology)
Medical Oncology

Locations:
Siteman Cancer Center – South County
Siteman Cancer Center – Barnes-Jewish St. Peters Hospital

Ramaswamy Govindan, MD

Medical Oncology

Locations:
Gary C. Werths Building at Siteman Cancer Center

Alfred O. Greco

Alfred O. Greco, MD

Cancer (Oncology)
Medical Oncology

Locations:
Alton Memorial Hospital – Medical Office Building B

Patrick Michael Grierson, MD, PhD

Cancer (Oncology)
Medical Oncology

Locations:
Gary C. Werths Building at Siteman Cancer Center
Siteman Cancer Center – South County

Melissa Amy Grizzle, FNP-BC

Medical Oncology

Locations:
Center for Advanced Medicine Siteman Cancer Center
Barnes-Jewish West County Hospital – Siteman Cancer Center Medical Office Building 2
Siteman Cancer Center – North County

Olivia Hasselfeld, PA-C

Cancer (Oncology)
Medical Oncology

Locations:
Siteman Cancer Center – North County
Siteman Cancer Center – Barnes-Jewish St. Peters Hospital

Brett Herzog, MD, PhD

Brett Herzog, MD, PhD

Cancer (Oncology)
Medical Oncology

Locations:
Memorial Hospital Shiloh – Siteman Cancer Center, Medical Office Building 2