ATLANTA (AP) Activists are planning a demonstration to protest Blue Cross Blue Shield's recent decision to no longer cover Grady Memorial Hospital. <br /> <br /> State Sen. Vincent Fort, members of the Grady Coalition and others such as Sunshine's Angels of Mercy Children's Group plan to protest at 10:30 a.m. Tuesday near the Buckhead MARTA station on Peachtree Road. <br /> <br /> WSB-TV reported that the Atlanta hospital and the insurance firm were unable to reach an agreement on rates. <br /> <br /> Grady said the insurer is paying it far less than it pays other hospitals. Grady says payments that are too low threaten the hospital's ability to maintain adequate care. <br /> <br /> Blue Cross Blue Shield says it has submitted multiple proposals offering an increase in the rates it pays the hospital. <br /> <br /> Grady stressed that it will not turn people away.