Michaels' father had also said his son's speech was slurred and his vision was blurry when he spoke to him shortly after he was hospitalized. However, Zabramski said in Tuesday press conference that upon leaving the hospital, the rocker had no problems with slurred speech, but that he was still experiencing severe back pain.
In addition to his musical career, Michaels can be seen each week as a top contender on Donald Trump's NBC reality show "The Celebrity Apprentice," competing against singer Cyndi Lauper and media maven Sharon Osbourne, to name a few of the remaining competitors. He previously starred in VH1's "Rock of Love With Bret Michaels."
ABC News' Sheila Marikar contributed to this report.