The Coastal Health Alliance will move forward with a merger with a Sonoma County health care center over twice its size, following a unanimous vote last Thursday by the alliance’s board of
directors. 

The move is intended to sustain West Marin’s three nonprofit clinics into the future, and comes after a joint committee spent six months exploring the idea. 

C.E.O. Steven Siegel said the health alliance “realized that being part of a larger organization is…