The move comes nearly a decade after the health care giant warned that its Alta Bates Summit Medical Center in Berkeley would shutter by 2030 because state-mandated seismic upgrades were infeasible for the 120-year-old complex — stirring fears of a “hospital desert” in the East Bay.

Sutter Health is investing $1 billion to build a new medical campus in Emeryville, which will include a flagship hospital and expanded outpatient services.