Frank died Sunday at a hospital near his home, the Los Angeles Times reported Tuesday. His funeral was planned for Wednesday.
Frank is credited with putting two anchors into a single news broadcast for NBC's "The Huntley-Brinkley Report" back in the 1956, the Times said.
He was also known for his hard-hitting news documentaries such as the 1962 report, "The Tunnel," about 59 Germans who escaped through a secret passage under the Berlin Wall.
Frank was president of NBC News from 1968 to 1972 and from 1982 to 1984.
He is survived by his wife and two sons.