Jairo Medina, 62, a professional carer from Chelsea, was found near Speakers' Corner on the morning of 12 August by a member of the public.
A post-mortem examination did not find a cause of death, but showed that he had been assaulted, police said.
Hani Khalaf, 21, of no fixed address, will appear before magistrates in Wimbledon on Saturday.
A man has been charged with the murder of a carer who was found dead in London's Hyde Park.