Last year, Panorama exposed that many frail and mentally disabled people at a private nursing home in Bristol were being treated badly.
Winterbourne View closed down after the BBC investigation and six support workers were jailed for abusing vulnerable patients.
Now new fears have been raised over what has been happening to a large number of the people who were put in other homes when Winterbourne View was closed down: at least 19 of the 51.
Mark Goldring, chief executive of learning disabilities charity Mencap, says Winterbourne View patients were moved without proper planning and consideration.
"What's happened here is that people were sent to the wrong institution," he said.
"When Winterbourne was rightly closed after the scandals last year, many were sent on to other institutions, whereas actually what needs to happen is that people are cared for and supported in smaller facilities, close to their homes where they can be reintegrated into society as quickly as possible."
"The best local authorities and health services have planned their services so that they're small and they're local. Others haven't and those are the ones who are having to send people across the country to the wrong kind of institution."
Paul Burstow, Lib Dem MP and former care service minister, says he wants to see more unannounced inspections by the Care and Quality Commission (CQC) and wants greater corporate responsibility.
He said: "The appropriate intervention would have been to provide better training, more support, access to specialist support, but locally - not far away from home."
"Winterbourne View was a closed institution, people were out of sight and out of mind, that's why they were vulnerable to abuse. As part of the closure programs... those commissioners didn't know what to do to commission the right sort of services."
Panorama: The Hospital that Stopped Caring
is broadcast on Monday 29 October at 20:30 GMT on BBC One.
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