Dr. Yoojin Koh specializes in obstetrics/gynecology in Vallejo area. Dr. Yoojin Koh, MD has a medical practice at 975 Sereno Drive, Vallejo CA, and has over 16 years of experience in the field of medicine. She graduated from Ohio State University College Of Medicine with her medical degree in 2001. Dr. Koh is accepting new patients at her medical office and practice location in Vallejo, California. She is available for appointments, preventative care, medical care as well as ongoing patient care.