The Health and Disabilities Commissioner received 14 complaints about Hawke's Bay District Health Board in the first half of this year.
Hawke's Bay DHB communications and media manager Anna Kirk said 10 had been closed and four were still with the HDC awaiting a decision.
She said surgery was the most complained about service type and "care and treatment" the most complained about issue.
The rate of complaints was 86.38 per 100,000 discharges, just above the national average of 84.67 complaints.
The HDC reported receiving 389 complaints about care provided by DHBs nationally over the six months - the highest number of complaints ever received in a six-month period.