Thousands of pounds will be returned to families who unknowingly paid "continuing healthcare fees" for their elderly relatives. Powys Teaching Health Board were ordered to make the pay out following an investigation by the Public Service Ombudsman.
Approximately 330 people will be compensated after "excessive delays" to initial claims for wrongly paid fees.
Hundreds of families who may be due reimbursement for payments made between 2003 and 2013 are still waiting for their claims to be assessed. The decision is based on whether a patient's needs were primary for health or social care.
Stephen Nicholls incorrectly paid full care costs for his mother Megan for ten years.
Hugh James represented Mr Nicholls and has also submitted a series of complaints on behalf of thousands of Welsh families.
Lisa Morgan, partner and head of nursing care department at Hugh James, said work still needs to be done.
The Health Board are continuing to complete the claims with the hope of getting final decisions to families in the coming months.