Fred Warmbier told Fox News' Tucker Carlson on Wednesday from his OH home that his son, Otto, "is not in great shape right now".
They also said they are grateful he "will finally be with people who love him".
Otto Warmbier, 22, had been sentenced to 15 years of hard labor, after he was accused of attempting to steal a propaganda poster from a hotel where he had stayed as a tourist. "How did he fall into a coma?"
Americans are regarded as enemies in North Korea because the two countries never signed a peace treaty to formally end the 1950-53 Korean War. And how does the Trump administration respond?
President Moon Jae-in and his USA counterpart Donald Trump will hold their first face-to-face talks since they both took office in Washington on June 29-30 (local time).
Rodman said the issue of several Americans detained by North Korea is "not my objective right now", in remarks made in Beijing before the release of Warmbier was publicly disclosed. It's nearly like he's perpetually auditioning for the non-existent post of United States' ambassador to North Korea.
The president of an American university where a student attended before being imprisoned by North Korea says the school is "deeply concerned and saddened" to learn that he is in a coma.
USA student Otto Warmbier is escorted at the supreme court in Pyongyang, North Korea, in 2016.
"The visit was the first time the United States was able to confirm Warmbier's status after he was sentenced", Fox News reported.
The State Department advises "strongly" against visits by USA citizens to North Korea, noting that at least 16 Americans have been detained there over the last decade. Moreover, Rodman himself said in advance that he was not intending to discuss the Americans detained by the regime.
His four past trips in 2013 and 2014 generated a storm of publicity, most of it unfavorable, and did little in terms of diplomacy.
President Trump has been soft-pedalling his public stance on China in the hope that Beijing will force Pyongyang to abandon its nuclear programme.
It is not immediately possible to determine whether Mr. Warmbier's condition is due to events as described by the North Korean government.
The statement from Leigh contradicts the more serious claim North Korea made in May.
"It wasn't a situation where they asked", one official said of the US representatives. The North Koreans "were informed that the airplane would land".
"The Secretary of State has confirmed to me that Otto has been released by North Korea, and is being returned to his family", the Ohio Republican said in a statement.
"Joe Yun went to Pyongyang (Monday) to accompany Mr. Warmbier", Shannon told reporters after a meeting with South Korean Vice Foreign Minister Lim Sung Nam.
During his detention, Leigh said he was provided with one meal a day, and slept on a blanket on the floor. "Take care of Otto", Trump is said to have instructed his top diplomat.
Multiple reports indicate that Warmbier fell into a coma the same month he was sentenced.
There was no immediate confirmation from US officials of North Korea's description of his illness - including whether he was stricken with botulism, a potentially fatal disease that is caused by a toxin but is not usually associated with loss of consciousness. James Bernat, a coma expert at the Dartmouth-Hitchcock Medical Center in New Hampshire, told the Washington Post that the probability of a person recovering from a coma or vegetative state depends heavily on how long the condition has lasted.
The last time Rodman visited North Korea, he delighted the country's young ruler with a rendition of "Happy Birthday", suffered an angry meltdown on CNN while defending his trip, and spent time at a rehab facility after returning to the United States.
The two American teachers were arrested last month for allegedly carrying out hostile activities against Pyongyang.