Of the cases confirmed on Friday, 13 were detected via PCR tests and five by RATs.
The ministry says its daily reported case numbers may differ slightly from those reported at a DHB or local public health unit level.
Nationally, there were 12,011 new community cases, with 237 people in hospital.
Testing numbers across the Whanganui DHB have been steady this week as cases around the country continue to climb.
Last Saturday and Sunday, 293 people were tested.
From Monday to Thursday this week, 649 were tested across the Whanganui DHB region.
Monday was the busiest day, with 177 people getting tested.