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Where a classification manual PLACES a diagnosis carries real meaning, since it reflects whether the condition itself is considered a mental illness. Gender incongruence is a marked and persistent mismatch between a person's experienced gender and their sex assigned at birth. For example, imagine a transgender woman (someone assigned male at birth who identifies as a woman) seeking hormone therapy: her identity itself is not a mental disorder, even though she may need specific health support. In practice, understanding this classification change matters both clinically and for reducing stigma.

ICD-11 (the World Health Organization's current diagnostic manual) moved gender incongruence OUT of the mental disorders chapter entirely, placing it instead under 'conditions related to sexual health'. This was a deliberate depathologising step, recognising that being transgender is not, in itself, a mental illness. DSM-5 (the American classification) instead keeps a related diagnosis, gender dysphoria, but explicitly requires clinically significant distress or impairment, not identity alone, to make the diagnosis. Say two transgender men (assigned female at birth, identifying as men) have equally clear gender identities: one experiences no distress and functions well, the other experiences severe distress about his body. In practice, only the second man would meet DSM-5's gender dysphoria criteria, since distress is the required element there, unlike ICD-11's approach.

• Which term does DSM-5 use for the condition that ICD-11 calls gender incongruence?
• What is the professional position on attempts to change a person's gender identity to match their sex assigned at birth?
• What is the main role of a psychiatric assessment for a person with gender incongruence?

• Gender incongruence (ICD-11), classified outside the mental disorders chapter, unlike gender dysphoria (DSM-5), which remains a psychiatric diagnosis.
• Gender dysphoria (DSM-5), requires clinically significant distress or impairment, rather than identity mismatch alone.
• Gender identity, a person's internal sense of their own gender, unlike sexual orientation, which describes who a person is attracted to.
• Sexual orientation, about attraction to others, whereas gender incongruence concerns a person's own experienced gender identity.

• Transsexualism was an ICD-10 subcategory rather than the DSM-5 term.
• Gender nonconformity is a descriptive social term rather than a diagnosis.
• Gender identity disorder was the ICD-10 term and has been superseded.
• No evidence supports effectiveness at any age, and harm is documented.
• No such requirement exists before referral.

• Extract the defining phenomenology, duration, severity and functional-impact clues.
• Match the pattern to the most specific diagnostic or assessment construct.
• Actively test the closest look-alike against the missing or contradictory clue.
• Choose the precise term rather than a broader category that is merely compatible.