John Tlumacki/Globe Staff

Dr. Kevin Tabb, left, chief executive of Beth Israel Deaconess, and Milton president Joseph Morrissey celebrated their new partnership.

Matthew J. Lee/Globe Staff

Milton Hospital was starting 2012 with a new name: Beth Israel Deaconess Hospital-Milton.

Matthew J. Lee/Globe Staff

The 81-bed hospital was taken over by Beth Israel Deaconess Medical Center on Sunday.

Matthew J. Lee/Globe Staff

By extending its hospital network, Beth Israel Deaconess can strengthen the 1,700-member Beth Israel Deaconess Physicians Organization.

John Tlumacki/Globe Staff

“We realized that we needed to grow. We needed more primary care physicians that called Milton Hospital their primary hospital," said Morrissey.