Dr. Raphael Brendan Merriman, MD is a health care provider primarily located in SAN FRANCISCO, CA, with other offices in San Francisco, CA and Sacramento, CA. He has 34 years of experience. His specialties include Hepatology, Gastroenterology, Internal Medicine, Pediatric Gastroenterology. Dr. Merriman is affiliated with California Pacific Medical Center Saint Lukes Campus. He speaks Spanish and Tagalog.