SMG contains primary care and specialty Physicians and Advanced Practice Clinicians -- nurse practitioners, physician assistants, certified nurse midwives, licensed clinical social workers and licensed marriage and family therapists, who make up about 20% of our group. Community Information: Fairfield, located in the heart of Solano County, offers an exceptional Northern California lifestyle with convenient access to the San Francisco Bay Area, Napa Valley, Sacramento, and the region's many outdoor destinations.