Whanganui District Health Board has changed its computer software for laboratory test procedures to include transgender people.
Medlab Central, which provides testing for the Whanganui DHB, has changed software which dictated tests, including cervical smears, prostate markers and pregnancy tests, for specific genders.
Trans men and women could previously be referred for tests but in order to actually have them done, their GP would have to change their gender marker beforehand and then change it back afterwards.
"There are now no gender constraints on ordering tests," Medlab Central chief executive Dr Cynric Temple-Camp said.
Clinicians could now select the appropriate gender group based on their knowledge of each patient's personal circumstances.