Question to the Department of Health and Social Care:

To ask Her Majesty's Government what plans they have, if any, to declassify transgender as a mental disorder.

The Government is not responsible for the classification of mental illnesses. The most widely used relevant classification systems for the diagnosis of illnesses is the International Classification of Diseases (ICD), published by the World Health Organization, and for mental illness, the Diagnostic and Statistical Manual of Mental Disorders (DSM) edited by the American Psychiatric Association.

The DSM removed references to transgender as a mental disorder in its last revision in 2013. The ICD still contains classifications of gender identity as mental disorders, and this aspect is currently subject to revision.