Dr Louis O’Carroll from Listowel had been walking when he was struck by a car on Friday night.
Despite the impact, the driver of the car, who came forward to gardaí following an appeal, said that immediately after the incident Dr O’Carroll told her that he was not badly hurt.
He was able to keep walking to a friend’s house but a few hours later his condition deteriorated rapidly and an ambulance was called.
He died before he reached Tralee General Hospital.
A postmortem is expected to reveal whether or not Dr O’Carroll’s death was linked to the incident.
The 62-year-old had been a well-known figure in Kerry, first as a renowned consultant psychiatrist and more recently for his musical talents.
Last March he released his debut CD, River to Sea, a 10-ballad album which he recorded in aid of Kerry Hospice.
Meanwhile, a 21-year-old woman died in a single vehicle crash in Galway over the weekend.
The woman, who has been named locally as Jennifer Reilly from Ardskea More in Corofin, was the sole occupant of a car which struck a wall on a minor road between the N63 and Corofin village in Tuam at 6pm on Saturday.
She was pronounced dead at the scene and her body removed to University College Hospital Galway.
Gardaí in Tuam are investigating the crash.