Almost two years after a merger created Southern Maine Health Care, officials announced a reorganization that will end overnight hospital care in Sanford and eliminate about 13 positions.

The center undertook a yearlong analysis leading to the reorganization of its services, according to a statement issued Wednesday.

Southern Maine Health Care will keep its 24-hour emergency center in the former Goodall Hospital in Sanford and add a walk-in care center. It will open a new cancer care practice and have more specialists so patients won’t have to travel to see a cardiologist, a pulmonologist or a neurologist, officials said.

Because of low patient volume in Sanford, Southern Maine Health Care will no longer provide overnight inpatient care there, sending those patients to Southern Maine Health Care in Biddeford starting Oct. 23, said Ed McGeachey, SMHC’s president and CEO.

“Overall, this is very good news for the people of the Sanford/Springvale region because almost all of our current services will continue in Sanford,” he said. “In fact, some services will be enhanced and we will be adding new services.

“This change is being made for one reason only: the small number of inpatients cared for in Sanford,” McGeachey said, noting that Sanford has an average of 12 to 14 inpatients a day. “Residents of the Sanford region that are acutely ill will benefit from the depth of complex clinical support available at the larger Biddeford Medical Center.”

About 13 staff members will lose their jobs because of the changes, he said, but “many” will be offered positions over the next six weeks.

Goodall Hospital and Southern Maine Medical Center in Biddeford merged in January 2014 to become Southern Maine Health Care, the fifth largest health care system in Maine.