His Majesty the King left Siriraj Hospital early on Friday after spending a day there for a regular check-up, state-run Radio Thailand has reported.
No details of the results of the medical examination were released to the media.
His Majesty left the hospital for Chitralada Palace at 3.30 am. He was accompanied by Her Majesty the Queen and other members of the Royal Family.
Despite the early hour, a large crowd was at the hospital grounds to wish their eighty one year-old King well.
He arrived at the hospital on Wednesday night and walked in with the help of a walking stick.
His Majesty has appeared healthy recently, and hosted a formal reception at the Royal Palace for the visiting Malaysian king Sultan Mizan Zainal Abidin on Monday.
Source - The Bangkok Post