As Radar previously reported, Boyd suffered from a heart condition that led to his passing.
However, the Scott County Coroner in the opera singer's native Missouri told Radar, a host of other health problems also contributed to his death.
"Neal had many health issues, including heart failure, kidney failure, and liver disease," Coroner Scott Amick claimed.
The 42-year-old passed away on Sunday, June 10, at his mother's Missouri home around 6:30 pm.
"Given all of Neal's medical problems, there was no reason to do an autopsy," Amick told Radar.
In 2017, Boyd was involved in a terrible car accident after he reportedly blacked out behind the wheel.
The wreck left both the star and his mother badly injured.
He won season three of AGT in 2008.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at 800-344-9598 any time, day or night.