Lewis Budge allegedly killed Robert Bromell at Corran Esplanade in Oban on September 6, 2023.
Prosecutors said the 21-year-old pushed Mr Bromell onto the road and into the path of the emergency vehicle.
It was also said that Mr Bromell, 39, was struck and passed away the next day at the Royal Alexandra Hospital in Paisley, Renfrewshire.
Budge also faces a separate charge of attempting to defeat the ends of justice. It is claimed he left Corran Esplanade before police arrived.
The indictment claims Budge turned up at a flat in the town and told two men that Mr Bromell had fallen into the path of the ambulance.
This was allegedly done in a bid to avoid "detection, arrest and prosecution".
The case on February 18 called for a hearing at the High Court in Glasgow.
Budge’s legal team pleaded not guilty on his behalf.
A trial is now scheduled to start in January 2026 and could last up to six days. Budge remains on bail meantime.
Members of Mr Bromell’s family paid tribute to him at the time of his death. He was known as Hogan to relatives and friends. His sister Teresa Campbell reportedly said: "He was just the happiest, funniest person I have ever known. He was always saying hello to strangers in the street.
"He was a legend. I never saw him down. If I was feeling down, he would bring me right back up again."
Mr Bromell had stayed with his sister at one stage on the Isle of Bute before he moved to Oban around two years before he passed away.
A GoFundMe page raised £2,400 to help with funeral costs.