Adventist Health Clear Lake Medical Office - Clearlake, Physical Medicine & Rehabilitation. [XX.X] miles. 15230 Lakeshore Drive Suite 104. Clearlake, CA. Adventist Health Clear Lake Medical Office - Hidden Valley Lake. [XX.X] miles. 18990 Coyote Valley Road Suite 10. Hidden Valley Lake, CA.Services‧Clearlake Hospital‧Locations‧Careers‧Patient Resources‧Contact Us.