More than 300 people with disabilities in East Renfrewshire were wrongly denied benefits following the introduction of Personal Independent Payments (PIP).
Figures obtained under freedom of information, show 310 people in East Renfrewshire originally refused PIP have successfully challenged assessments.
There have been 460 appeals, meaning 65 per cent were initially denied benefits they were entitled to.
There are concerns many others may have been wrongly refused PIP but have not appealed the decision.
PIP has been rolled out to replace Living Allowance (DLA) as the main benefit for disabled or ill people.
To receive this benefit, claimants have to undergo controversial assessments, conducted by private companies on behalf of the Department for Work and Pensions.