Organisations say they're being overwhelmed trying to support people denied benefits and claim the system is in crisis.
Bradbury Fields in Liverpool works with those with sight issues and says too many people aren't being properly assessed.
Phil Longworth is the Chief Executive.
Charities are calling for a complete overhaul of medical assessments which tribunals show make too many wrong decisions.
Legal advocates say the assessment system is still getting too many decisions wrong, forcing thousands of claimants to go to court.
Organisations say they are overwhelmed trying to support people denied benefits and claim the system is in crisis.