Dr. Michael S. Baker is a general surgeon in Walnut Creek, California and is affiliated with multiple hospitals in the area, including John Muir Health-Walnut Creek Medical Center and John Muir Health-Concord Medical Center. He received his medical degree from Pennsylvania State University College of Medicine and has been in practice for more than 20 years. Dr. Michael S. Baker accepts Aetna, Blue Cross, United Healthcare - see other insurance plans accepted.