The deceased has been identified as Anurag Gupta, a dentist, who belongs to Patna and lived with his family in Shastri Nagar.
Police said no suicide note has been recovered from the room.
Gupta is survived by his wife and 9-year-old son.
Police said that in the morning, they received information that a doctor committed suicide by hanging himself from the ceiling fan at his residence.
A police team went to the spot and Gupta was taken to the district hospital where doctors declared him brought dead.
Gupta's body has been sent for postmortem.