Benjamin Tan, MD

Medical Oncologist

Benjamin Tan
View Appointment Options

Appointment Options

Whether you’re seeking a new patient appointment or exploring treatment options and looking for a second opinion, our Siteman care coordinators are ready to assist you.

Request an Appointment Call Us Refer a Patient

My Locations

Siteman Cancer Center at MidAmerica Plaza in South County

Expertise & Training

Clinical Expertise

  • Gastrointestinal cancer

Primary Academic Title

Professor of Medicine, Division of Oncology, Section of Medical Oncology, WashU Medicine

Board Certification

  • 1997: American Board of Internal Medicine, Medical Oncology
  • 1996: American Board of Internal Medicine, Internal Medicine

Training

  • 1991-1994: Resident, Internal Medicine, Sinai Hospital, Baltimore, MD
  • 1994-1997: Clinical Fellow, Hematology and Medical Oncology, WashU Medicine, St. Louis, MO
  • 1997-1998: Research Fellow, Hematology and Medical Oncology, WashU Medicine, St. Louis, MO

Education

  • 1990: MD, University of the Philippines, Manila, Philippines

Research & Selected Publications

Authors:

Zhang GQ, Meyerhardt JA, Shi Q, Tan B, Nowak JA

Journal & Year:

JAMA Oncol | 2026

Authors:

Meyer T, Finn RS, Borad M, Tan BR, Sangro B

Journal & Year:

J Hepatol | 2026

Authors:

Grierson PM, Wolf C, Suresh R, Tan BR, Lim KH

Journal & Year:

Clin Cancer Res | 2025

Authors:

Raghav KPS, Guthrie KA, Tan B, Philip PA

Journal & Year:

J Clin Oncol | 2025

Authors:

Shroff RT, King G, Colby S, Tan B, Philip PA

Journal & Year:

J Clin Oncol | 2025

Authors:

Nowak JA, Twombly T, Ma C, Tan B, Meyerhardt JA

Journal & Year:

J Clin Oncol | 2024

Authors:

Oh DY, He AR, Bouattour M, Tan B, Valle JW

Journal & Year:

Lancet Gastroenterol Hepatol | 2024

Authors:

Patel SP, Othus M, Chae YK, Tan B, Kurzrock R

Journal & Year:

J Immunother Cancer | 2024