Outcomes are reported from an audit performed on routine hospital data collected from 656 women who gave birth over two 6-month periods (June to December in 2013 and 2014) in two Mid-North Island hospitals in the Bay of Plenty region, an area with a high Māori population. Just 416 (63%) women were screened for diabetes in pregnancy, including 390 (60%) for gestational diabetes mellitus (GDM) later in pregnancy. Significantly higher proportions of New Zealand European/Other and Asian women were screened compared with Māori women (75% and 77% vs 56%, respectively; p<0.0001). After controlling for ethnicity, women aged 35–40 years were more likely to be screened compared with those aged 25–29 years (77% vs 61%; p=0.02). Screening was associated with longer hospital stays following birth; screened women were more likely to stay >5 days than <1 day, compared with unscreened women (84% vs 56%; p<0.0001). A significantly higher proportion of women were screened in 2014 than in 2013 (68% vs 58%; p=0.008).