Most watchdog investigations into NHS Grampian over the last five years have identified failings, according to a report.
Findings by the Scottish Public Service Ombudsman were presented to the board’s patient focus and public involvement committee.
They showed that an average of 17 complaints each year resulted in a formal outside probe between 2011 and 2016.
In a third of cases the grievances of patients, families and others were fully upheld – with health chiefs told to take action.
Another 22% were partially upheld.
In 45% of cases the watchdog found there was no case to answer.
In his most recent report, ombudsman Jim Martin was critical of NHS Grampian for “significant failings” in the care of an Alzheimer’s patient.
He also took the unusual step of reprimanding the board for its handling of the complaint by the man’s widow – accusing bosses of a “dismissive, defensive” attitude.
The patient focus committee has also agreed to change its name after a review of its role and remit.
From next year it will be known as the engagement and participation committee.