Dr. Ruben "Alfonso" Hernandez Acosta is an infectious disease specialist who cares for patients throughout the St. Louis metropolitan area. He focuses on providing expert care for adults over the age of 18, with a special emphasis on individuals who have undergone transplants or are immunocompromised.

Dr. Hernandez Acosta offers a range of services, including inpatient consultations, outpatient clinic visits, and telemedicine appointments. His clinical interests include managing infections in transplant recipients, cancer patients, and others with weakened immune systems. He is committed to delivering high-quality care grounded in compassion, honesty, and evidence-based medicine.

Dr. Hernandez Acosta is an assistant professor in the Department of Medicine, Division of Infectious Diseases at Saint Louis University School of Medicine. His research focuses on infections in transplant and cancer patients, fungal and viral infections, and improving diagnostic stewardship.

He is a member of several professional organizations, including the Infectious Diseases Society of America, the American Society of Transplantation, and the Mycoses Study Group Education & Research Consortium.

Outside of medicine, Dr. Hernandez Acosta enjoys reading, cooking, and music.