Inspections on 58 nursing homes has found issues with residents' privacy and dignity in several facilities.
The HIQA reports singled out St Finbarr's Hospital in Cork, St Joseph's Hospital, Ennis, Kanturk Community Hospital in Cork and Killarney Community Hospitals in Kerry.
Of the 59 reports published, inspectors found evidence of good practice and compliance with the regulations and standards in 33 centres.
In general, HIQA says these centres were found to be meeting residents' needs and delivering care in line with the national standards and regulations.
But inspectors found evidence of non-compliance in 25 centres.
In these centres, HIQA says the provider failed to ensure that the service delivered to residents was effectively monitored in line with regulations and standards.
At St Finbarr's Hospital, HIQA said there was inadequate space for residents to store their clothes and personal possessions - and to have access and control of personal possessions.
It also said there were not suitable facilities for families to spend time alone with residents as they approached the end of life.
And the design and layout of the premises did not meet the needs of the residents living in the centre.
It found that multi-occupancy bedrooms did not support residents' privacy and dignity, and beds were too close together.
At St Joseph's Hospital in Ennis, HIQA said visits with residents are "often interrupted or shortened when residents have visitors in the multi-occupancy rooms".
"The limitation of space in the multi-occupancy bedrooms meant that visits between residents and relatives were not conducted in private.
"For example, the conversation could be easily overheard by all people in the room", it said.
It also said there were "inadequate storage facilities available for personal possessions."
For Kanturk Community Hospital, HIQA said it identified non-compliance in infection control, fire precautions and food and nutrition.
And at Killarney Community Hospitals, HIQA uncovered major non-compliance in relation to safe and suitable premises.
It also said there was a failure to take all necessary action to improve the privacy and dignity of residents.
