Dr. Krishnan did his graduation from Maulana Azad Medical College in 1976 and MS in 1980 from the Central Institute of Orthopedics at Safdarjang Hospital. He obtained further training and qualifications in the UK, including an MCH from Liverpool with a Norman Roberts medal, a Ph.D. from the Royal Postgraduate Medical School and Hammersmith Hospital in London, and the UK Intercollegiate Specialty Board Examination of the Surgical Royal Colleges.