Yes there are 2 exams this year. Its clearly mentioned in the prospectus but post mbbs exam only for MD psychiatry in thr 2nd session. Moreover number of seats got reduced, ie, divided into half in 2 sessions. So apart for domiciliary nd north east, only 10 seats for general . Exam is on October 20. Form not out till now. Probably this week it will be out.

dear aspirant,hope you are doing well. Now coming to your question,NIMHANS is one of the most prestigious institutes for Post Graduate Medical studies in India.
About 20,000 aspirants take the NIMHANS entrance exam for entry into 6 year DM/MCh and 3 year MD Psychiatry at NIMHANS.
This blog will familiarize you with various details pertaining to the NIMHANS entrance such as the Scheme and Pattern of Exam, Important Dates and some preparation tips.
NIMHANS is an online objective pattern PG Entrance Exam conducted for admission to direct M.Ch. Neurosurgery/DM Neurology and MD Psychiatry courses.
A common entrance exam is conducted for all these courses and a separate Merit list is published for every course.
The exam is conducted twice a year – for the January and the July session.

hope this will help.