Billy Joel insists he is 'okay' amid brain condition battle In an update for fans after it was revealed he was suffering from a rare brain condition, Billy Joel has insisted he is "okay". 21 July 2025 Billy Joel insists he is "okay". Billy Joel insists he is 'okay' The Piano Man crooner, 76, worried fans in May when it was announced he had been diagnosed with normal pressure hydrocephalus (NPH), a rare but treatable condition that affects the brain and can impair hearing, vision and balance.