Bay of Plenty District Health Board says data collection issues - not a drop in services - has resulted in it being rated the lowest in the country at offering support to help smokers quit.
The DHB's performance rating for the Ministry of Health's Better Help for Smokers to Quit target in the July to September quarter was just 68 per cent - well below the national DHB average of 83per cent.
"Data collection issues" - not a drop in services - are behind the low rating, said the health board's planning and funding general manager Simon Everitt.
"There has been no drop in the practical level of support and advice provided to smokers, they are still receiving the same level of care which placed the DHB second in the country just three months ago so we need to determine what has happened with data collection to cause this anomaly," he said.
"[Prior to the quarter] it had shown sustained improvement brought about through system modifications which ensured each smoking patient was given advice and support to quit smoking for their overall health and recovery."