WHO No Longer Classifies Being Transgender As Mental Disorder The World Health Organization previously considered “gender incongruence” a mental health condition experienced by transgender individuals. Dr. Lale Say, coordinator at WHO, via Newsweek The International Classification of Diseases (ICD) defined “gender incongruence” Transgender and genderqueer identities will now be classified under sexual health conditions. The WHO has revised classifications before. Back in 1948, homosexuality was classified as a mental illness before being removed from the ICD in the 1970s.