Authorities say a pizza delivery driver who was concerned about a regular customer in Memphis, Tennessee, may have saved the elderly woman's life.
Domino's delivery driver Susan Guy told WMC-TV that Jean Wilson has ordered pizza every day for the past three years.
On Monday, Guy said her boss told her Wilson had not called in three days. Guy insisted on going to check on the woman.
When no one came to the door, Guy asked a neighbour whether he had seen her and then called police.
Police broke the door down and found Ms Wilson on the floor.
She had fallen on Saturday and could not get to a phone to call for help.
Investigators said it is possible her pizza-heavy diet may have saved her life.
Ms Wilson was said to be in non-critical condition at a hospital.