Alta Bates Summit Medical Center- 2450 Ashby Ave, Berkeley, CA 94705. EyeMD Laser and Surgery Center- 481 30th St, Oakland, CA 94609. Walnut Creek: Aspen Surgery Center- 133 La Casas Via Suite 150, Walnut Creek, CA 94598. John Muir Eye Lab- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598.