South Yorkshire Police visited Robert Walton, 66, at his home on Meadow Street in Dinnington on 7 April in response to concerns about his welfare.
He was found dead following a fire at his home the next day.
The Independent Police Complaints Commission (IPCC) will examine whether officers made the right decisions.
Police are being investigated over the way they responded to concerns for a Rotherham man the day before he died in a fire.