Singer Ozzy Osbourne reportedly died of a heart attack when he passed away on July 22 at the age of 76.
Cardiac arrest, coronary artery disease and Parkinson’s disease with autonomic dysfunction were also listed as causes in the death certificate, according to The New York Times and The Sun.
Osbourne announced in 2020 he had been diagnosed with Parkinson’s. In 2025, his wife, Sharon, said that the disease left him unable to walk. It also caused him to struggle with his speech, but didn’t affect his voice.
The heavy metal star, who was nicknamed the “Prince of Darkness,” had been dealing with a host of health problems leading up to his death.
He had surgery on his neck and spine after an all-terrain vehicle accident in 2003 and suffered from blood clots in his legs. Osbourne also struggled with drug and alcohol addiction.
“He was with his family and surrounded by love” when he passed away, his loved ones said in a statement.
Osbourne’s death came just weeks after he reunited with his original Black Sabbath bandmates Tony Iommi, Geezer Butler and Bill Ward, for a final show in July 2025.
His wife told the BBC the performance was his goodbye to the band and to his fans.
Ozzy Osbourne’s Causes of Death
Osbourne’s causes of death were: “(a) Out of hospital cardiac arrest (b) Acute myocardial infarction (c) Coronary artery disease and Parkinson’s disease with autonomic dysfunction (Joint Causes),” according to The New York Times.
Cardiac Arrest
Cardiac arrest occurs when the heart stops functioning due to an irregular rhythm. The person stops breathing and becomes unconscious. It requires immediate treatment to prevent death. The condition is different from a heart attack.
In the U.S., 90% of patients who suffer an out-of-hospital cardiac arrest do not survive.
Acute Myocardial Infarction (Heart Attack)
Also known as a heart attack, acute myocardial infarction refers to when the heart or parts of the heart are not getting enough blood flow, usually due to a blockage in an artery. A heart attack can lead to a sudden cardiac arrest.
Coronary Artery Disease
Coronary artery disease is a type of heart disease that leads to reduced blood flow to the heart. A common cause is fats, cholesterol and other substances building up in the arteries and along their walls. It takes many years to develop.
Parkinson’s Disease With Autonomic Dysfunction
Parkinson’s is a degenerative brain condition that causes balance problems, shaking, difficulty moving and more. Symptoms worsen over time. In addition to affecting motor skills, it can harm the autonomic nervous system, which regulates involuntary bodily functions, like breathing, digestion and heart rate.
Common autonomic nervous system symptoms in people with Parkinson’s include low blood pressure, gastrointestinal problems and sexual dysfunction.
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