Dr Sanjay Ugemoghe, who is monitoring his treatment in Lilavati Hospital, told reporters that 57-year-old Patil is responding to treatment.
"We are trying our level best to bring him out of it. He is responding to the treatment," he said.
Party leaders Ajit Pawar, Supriya Sule, Sunil Tatkare, Chhagan Bhujbal were among the visitors to the hospital to inquire about Patil's health.
Patil, the prominent NCP leader from Sangli in western Maharashtra, was operated last December at Breach Candy Hospital and undergoing treatment at Lilavati Hospital.