Nirnayam (transl. Diagnosis) is a 1995 Indian Malayalam-language action thriller film directed by Sangeeth Sivan, produced by Suresh Balaje, and written by Cheriyan Kalpakavadi. The film stars Mohanlal and Heera Rajagopal. The plot follows a renowned surgeon who has been falsely accused for his wife's murder escapes from the custody to discover the truth behind the incident and the actual perpetrators. The film's music was composed by R. Anandh.

The plot is heavily based on the American film The Fugitive, which itself is based on the 1963 TV series of the same name with both being partially inspired from the actual case of Sam Sheppard.