Dr. Rena D. Callahan graduated from the University of Pennsylvania School of Medicine in 2004. She works in Valencia, CA and 1 other location and specializes in Hematology/Oncology. Dr. Callahan is affiliated with Santa Monica UCLA Medical Center, Ronald Reagan UCLA Medical Center, Henry Mayo Newhall Memorial Hospital and Huntington Memorial Hospital. She speaks English and Spanish.
Years in Practice: 10 Years
Languages Spoken: English, Spanish
Medical School: University of Pennsylvania School of Medicine
Graduation Date: 2004
*This physician has multiple office locations. See Appointments for details.