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For hours, walk-ins and appointments.Dr. Heidi Ko is board certified in Internal Medicine, Hematology and Medical Oncology. She received her medical degree from Rowan University School of Osteopathic Medicine in Stratford, NJ and her Internal Medicine training at McGovern Medical School at UT Health in Houston, TX. Dr. Ko completed her Hematology and Oncology fellowship training at Montefiore Medical Center/Albert Einstein College of Medicine in Bronx, NY. After her fellowship, Dr. Ko worked as a hematologist and medical oncologist in Houston and, most recently, worked as a breast medical oncologist at UT Health San Antonio-Mays Cancer Center in San Antonio, TX.