Battle of Fancheng
Hua Tuo's biography in the "Sanguozhi" does not specify his year of death, but it is certain that he died before 208. (See #Cao Cao's death for more information.) The Battle of Fancheng took place in 219, some 11 years after 208, so it was not possible for Hua Tuo to be around to heal Guan Yu's arm. However, Guan Yu's biography in the "Sanguozhi" mentions a similar incident, but without Hua Tuo's involvement. See Guan Yu#Arm injury for details.