Affiliated Faculty

Bruno C. Medeiros, MD

Associate Professor of Medicine (Hematology), Stanford University

Medicine - Hematology

Dr. Medeiros specializes in the treatment of advanced hematologic malignancies, including AML, ALL, MDS, and CML. His research focuses on developing novel therapeutic strategies for acute leukemia, particularly acute myeloid leukemia. He leads multiple clinical trials and collaborative studies and has authored over 120 peer-reviewed publications.


Irena Tan, MD

Hematology Staff Physician, Palo Alto VA Healthcare System

Adjunct Clinical Assistant Professor, Stanford

Stanford Hematology Fellowship PAVA Site Director

Dr. Tan attended medical school at the University of California, San Francisco, internal medicine residency at Duke, and hematology/oncology fellowship at Stanford. Her main clinical interests are in hematology, and she enjoys teaching and interacting with trainees.


Wesley Witteles, MD

Clinical Assistant Professor

Medicine - Hematology

Veterans Affairs Palo Alto Health Care System, Hematology Section Chief

Cares for veterans with a spectrum of classical and malignant hematology disorders, with a focus on plasma cell dyscrasias and AL amyloidosis