PETERBOROUGH — Almost five months after two major health care systems with campuses in Keene and Peterborough announced their intention to become one, people can comment on the plans at a local listening session.

The session is slated for Thursday from 6 to 7:30 p.m. at Bass Hall in the Monadnock Center for History and Culture, 19 Grove St., Peterborough. It comes after three similar meetings last month, in Manchester, Wolfeboro and Lebanon.

Dartmouth-Hitchcock Health — a Lebanon-based network of five hospitals, including Cheshire Medical Center in Keene — and GraniteOne Health, which has three hospitals, including Peterborough’s Monadnock Community Hospital, signed in January a non-binding letter of intent that details their plans to combine.

The two systems would become Dartmouth-Hitchcock Health GraniteOne, they said in a joint news release in January. All of the organizations involved would keep their names, identities and local leadership, the release said.

A merger between the systems would consolidate health options in the Monadnock Region, bringing its only two hospitals under one umbrella.

In addition to Keene, Dartmouth-Hitchcock Health has hospitals in Lebanon, New London and Windsor, Vt., as well as 24 clinics in Vermont and New Hampshire.

GraniteOne has Catholic Medical Center in Manchester, Huggins Hospital in Wolfeboro and the Peterborough hospital.

Joanne M. Conroy, Dartmouth-Hitchcock Health’s CEO, said in January that uniting the two networks could take 18 months, involving continued negotiations between the two nonprofit systems.

The state’s attorney general, as well as federal regulators, must approve the union before it is finalized, Conroy said.

Both entities would also need approval from their boards of trustees, and from the bishop of Manchester, according to the release. Catholic Medical Center, which doesn’t perform abortions, would continue to “adhere to its Catholic model of care” if the two health systems combine, the news release said. Though the Diocese of Manchester doesn’t own Catholic Medical Center, the hospital seeks input from bishop of Manchester on Catholic principles.

This story has been changed to fix incorrect information provided about the location of the Peterborough session.

​Liora Engel-Smith can be reached at 352-1234, extension 1439, or Follow her on Twitter at @LEngelSmithKS.