The 92-year-old artiste who was awarded the Padma Shri in 1972 is suffering from schizophrenia, Parkinson's disease and sepsis besides a urinary tract infection.
Last week she was admitted to Ramakrishna Mission Seva Pratisthan where doctors said her condition is serious but they are monitoring her health.
Popular for her 'Meerabai bhajans', Roy had recorded her first album at the tender age of 12 and had famous rebel poet Kazi Nazrul Islam as her mentor.