1966 CIBA Prize in Psychiatry (outstanding work in Psychiatry), University of British Columbia School of Medicine
1966 Horner Gold Prize and Medal (highest aggregate standing in the subject of Medicine), University of British Columbia School of Medicine
1966 Dean M.M. Weaver Medal (outstanding record in four year medical course), University of British Columbia School of Medicine
1966 Dr. Walter Stewart Baird Memorial Prize (best graduation dissertation), University of British Columbia School of Medicine
1966 Northern Building Maintenance Ltd. Prize (outstanding record in all years of medicine), University of British Columbia School of Medicine
1966 Alma Mater Society of the University of British Columbia Award for Outstanding Scholastic Achievement
1967 Outstanding Intern Prize, Hospital of the University of Pennsylvania
1971 Award of Merit (Laughlin Award) for "Professional achievement, dedication, and scholarship in the graduate education program in psychiatry." University of Pennsylvania
1980-1981 Fellow, Foundations Fund for Research in Psychiatry at the Institute of Neurology, National Hospitals, Queen Square and Maida Vale, London, England
1987 H.B. Williams Traveling Professorship (Royal Australian and New Zealand College of Psychiatrists)
2005 Health Sciences Faculty Award for Excellence in Teaching, University of California, San Diego
2007 Distinguished Lifetime Contribution to Neuropsychology Award, National Academy of Neuropsychology
2013 Nelson Butters Award for Research Contributions to Clinical Neuropsychology, National Academy of Neuropsychology
2016 Paul Satz-International Neuropsychological Society Career Mentoring Award
2016 San Diego LGBT Community Center, County of San Diego Health and Human Services Agency, HIV Community Service Award
2019 County of San Diego, Proclamation honoring Dr. Igor Grant for Mental Health Awareness Month - "Igor Grant Day" on May 21


June 23, 1967 Licentiate of the Medical Council of Canada
July 5, 1967 British Columbia Medical License
July 1, 1967 Diplomate of the National Board of Medical Examiners
May 13, 1970 California Medical License
November 1971 Diplomate, Fellowship Examination in Medicine (Psychiatry) Royal College of Physicians of Canada
November 1971 Specialist Certificate, Royal College of Physicians and Surgeons of Canada
October 1972 Certified Specialist, American Board of Psychiatry and Neurology (Psychiatry)