The 'Mandy' singer underwent the serious procedure earlier this month in order to gain more mobility prior to his return to the concert stage in Chicago next year.
Manilow provided an update on his condition in a Facebook post by revealing that he's back on his feet again.
"The good news is that after three nightmarish weeks, I'm coming back from the dead. I'm slowly beginning to walk - still with a walker - but I think that will be over soon," the star wrote. "The doctors say that everything should start to ease up by the end of this week. If that's so, what a great New Year's Eve I'm going to have!"
The singer also offered his thanks to the doctors and nurses who helped him recover.
"[I'm] grateful for the genius doctors who can perform this incredibly complicated surgery; grateful for the caregivers who treated me like their own family and most of all grateful for good health," Manilow commented.
"I will never, never take being healthy for granted again… Not being able to do anything without a team of people helping me was an eye-opener. And I mean anything. Like getting out of bed or getting to the john to brush my teeth."
Manilow recently completed a seven-year residency in Las Vegas at the Las Vegas Hilton and The Paris Resort.
The musician has scored three US number one singles and numerous platinum albums over the course of his career. His latest album 15 Minutes was released in June.
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Watch Barry Manilow perform 'Can't Smile Without You' below: