Healthline is being swamped by the number of callers seeking medical advice, with some callers reporting wait times of 85 minutes.
24,000 people attempted to contact the phone service yesterday - seven times more than its usual volumes.
Healthline is the first point of call for people with symptoms of Covid-19 or people seeking other medical advice, while people registering for self-isolation can now do so online.
But those wanting information on Covid-19 - but not requiring clinical advice - should first access the Ministry of Health's website or contact a dedicated Government helpline via 0800 779 997 between 8am to 1am seven days a week or by visiting www.govt.nz/covid-19.
Information about attending events should be put to the event organiser, and information on travel can be found on the Safe Travel website at safetravel.govt.nz. The Ministry of Health website also has information about attending events.