A 52-year-old tourist has been confirmed as the Northern Territory's first case of COVID-19 .

The man tested positive last night and is in isolation in Royal Darwin Hospital. According to the Northern Territory Health Department, the 52-year-old man is receiving treatment in line with current plans.

The man had recently arrived in Darwin via Sydney, and NT Health says he has had limited contact with the local community.

The Top End Health Service Public Health Unit is undertaking contact tracing and will reach out to those who may have had contact with the man.

The NT Heath Minister and Deputy Chief Heath Officer will hold a media conference tomorrow morning.

The entrance to the Royal Darwin Hospital, where a 52-year-old man is being treated in isolation for the Northern Territory's first confirmed case of coronavirus. (AAP)

The first case in the Northern Territory comes as the rescued passengers from the coronavirus-stricken cruise ship, the Diamond Princess , finish their quarantine period early on Thursday morning.

164 Australians were flown from Yokohama in Japan to Darwin to begin two weeks of quarantine at an old workers' village outside the city.

During their isolation, AUSMAT officials conducted 45 tests on the passengers.

Eight tested positive in the centre, and were medically transferred to their home states for further treatment.

Sadly, 78-year-old West Australian James Kwan passed away while in isolation in a Perth hospital.

Two partners of evacuees who were transferred interstate with their partners also returned positive results while continuing their quarantine interstate.

In total, 10 evacuees from the cruise ship have tested positive since returning to Australia.

The evacuees will be allowed to take off their masks from 1.30am Thursday and will be treated to a breakfast barbecue before buses provide them transport to Darwin Airport.

There they have been gifted commercial flights interstate to return home.