Ozzy Osbourne had suffered from coronary artery disease as well as Parkinson’s, according to the certificate filed at a register office in London.

Ozzy Osbourne 's cause of death has been determined. According to a death certificate obtained by the New York Times and The Sun , the legendary rock star died of "out of hospital cardiac arrest" and "acute myocardial infarction," with coronary artery disease and Parkinson's disease with autonomic dysfunction listed as "joint causes."