The country's biggest provider of professional counselling has been run off its feet since last month's quake.
Relationship Services is government-funded to provide telephone trauma counselling to callers throughout the country.
Its national practice manager, Cary Hayward, says the agency has handled about 300 calls about the earthquake, as well as calls on other topics.
He says counsellors were still dealing with the September quake when the next one hit.
Relationship Services has one staff member unaccounted for in the CTV building and three others required hospital treatment after the quake.
Meanwhile, Health Minister Tony Ryall says anxiety and depression are on the rise in Christchurch.
Mr Ryall, who spent Wednesday visiting the city, says psychological and mental health support are the most pressing needs.