However, the hospital spokesman, Alberto Greco, refused to give details on the treatment.
Though reports suggest that Pavarotti was admitted in the hospital on August 7, the spokesperson said that he entered the facility a day later.
"He is currently under observation and his condition is satisfactory," the BBC quoted Gabriele Sorrentino, as saying.
In 2006, Pavarotti cancelled several gigs after he underwent surgery for pancreatic cancer.
Last month, reports stated that the opera legend, is sure that he is going to die soon.
However, Pavarotti clarified that the reports were highly exaggerated.