May he rest in peace
His natal chart does not show any strong tendency of health problems;
perhaps his 6th house ruler (Neptune) square Aries Moon can reflect emotional impulsivity or delusions, but nothing strongly connected to health I think,
other than a possible tendency for addiction to drugs or alcohol
Without knowing progressions, here are some possible natal transits on 10/28/21:
-Transiting Mars was square natal Uranus and Neptune, suggesting some impulsive, eccentric, or delusional action, or an accident, over-exertion
-Transiting Uranus was square natal Mars, again suggesting an impulsive, eccentric action, or an accident, over-exertion
-Transiting Neptune was entering his 6th house, possibly suggesting influence of medication or drugs
-Transiting Pluto was conjunct natal Neptune, his 6th house ruler, possibly suggesting profound change involving health