The author Greg Mortenson said Monday that his nonprofit Central Asia Institute has changed some of the financial practices that have drawn fire from charity watchdogs and former associates, according to Outside magazine and The New York Times.

A “60 Minutes” report broadcast on Sunday highlighted critics who said that the charity, which has raised millions of dollars for education and health in Afghanistan and Pakistan, paid for its founder’s travels to promote his books.

In an online interview with Outside magazine, Mr. Mortenson said the institute had made major operational changes this year, and he now finances his own travel.

Mr. Mortenson also acknowledged to Outside that he conflated events in his best-selling memoir, Three Cups of Tea, which described his time in Korphe, a remote Himalayan village he has said inspired him to launch the Central Asia Institute. He said such editorial decisions were largely the province of his co-author, David Oliver Relin.

Viking, which published Three Cups, said Monday it would conduct a review of the book and Mr. Mortenson, The Times also writes.