In his practice, Dr. Koenker focuses on minimally invasive surgery. He is an in-network provider for several insurance carriers, including Anthem, Blue Cross/Blue Shield, and Western Health Advantage. Dr. Koenker studied medicine at the University of California, San Diego (UCSD), School of Medicine. For his professional training, Dr. Koenker completed a residency program at Massachusetts General Hospital. His professional affiliations include Marin General Hospital (MGH) and Novato Community Hospital. New patients are welcome to contact his office for an appointment.