The report cited information from a King family member who was not identified.
King, 87, was said to be admitted to Cedars-Sinai Medical Center.
The broadcaster has had numerous health issues in recent years, including heart trouble, diabetes and lung cancer, The Associated Press reported.
In 2020, King confirmed that two of his five children had died within weeks of each other. Son Andy King died at age 65 in August of a heart attack and daughter Chaia King died at age 51 from lung cancer, King said in a statement.
King hosted “Larry King Live,” a hugely popular primetime talk show that ran from 1985 to 2010.
The Associated Press contributed to this story.