Mr Mahama was making a presentation on the findings of the survey conducted in June for Sokoto, Katsina, and Zamfara.
He warned that 2023 would be another very difficult year since there had been absolutely no funding from May onwards for the refugees and the displaced people.
The UN said in New York on Tuesday that $1.1 billion would be needed to tackle the humanitarian needs in the North-East.
The World Health Organisation (WHO) has warned that the Horn of Africa is experiencing one of the worst hunger crises of the last 70 years.
