Dr. Breen’s father, Dr. Philip C. Breen, said she had described devastating scenes of the toll the coronavirus took on patients.

“She tried to do her job, and it killed her,” he said.

The elder Dr. Breen said his daughter had contracted the coronavirus but had gone back to work after recuperating for about a week and a half. The hospital sent her home again, before her family intervened to bring her to Charlottesville, he said.

Dr. Breen, 49, did not have a history of mental illness, her father said. But he said that when he last spoke with her, she seemed detached, and he could tell something was wrong. She had described to him an onslaught of patients who were dying before they could even be taken out of ambulances.

“She was truly in the trenches of the front line,” he said.

He added: “Make sure she’s praised as a hero, because she was. She’s a casualty just as much as anyone else who has died.”

In a statement, NewYork-Presbyterian/Columbia used that language to describe her. “Dr. Breen is a hero who brought the highest ideals of medicine to the challenging front lines of the emergency department,” the statement said. “Our focus today is to provide support to her family, friends and colleagues as they cope with this news during what is already an extraordinarily difficult time.”