F43.23 — Transtorno de adaptação com ansiedade mista e humor deprimido

Aside from a clinical interview that involves discussing the patient's symptoms, recent stressors, and their impact on their life, a healthcare professional will also review the patient's medical and mental history.

It depends. However, generally, it should go away after six months.

No, they're different since the diagnosis related to F43.23 can be directly linked to an identifiable stressor, and the symptoms are a maladaptive response to that stressor.