Case Lab · Type B · Transfer

F39

"Not sure exactly what type — I'll just call it unspecified"

A referral letter states: "Patient reports three weeks of low mood nearly every day, loss of interest in all previously enjoyed activities, poor concentration, reduced appetite with a 4kg weight loss, and feelings of worthlessness. No prior episodes of low or elevated mood. Functioning significantly impaired at work." A trainee, pressed for time, writes up the referral as "F39 — unspecified, will need more history," without re-reading the letter closely enough to notice that the detail needed to classify further is already there.