According to https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4635662/ the only non-specific cause of death for senility (R54) is insufficient for cause of death and must be split into predicted causes if no positively identified disease or disorder was the cause of death.

Postponing death is a matter of treating diseases and disorders and preventing accidents and violence.

Evolution has non-death mechanisms too; bacteria exchange plasmids. With genetic modifications we're beyond the need for death anyway if we want species-level improvements.