F34.1 — Dysthymic disorder

F34.1

ICD-10 Chapter 5: Mental, Behavioral & Neurodevelopmental — illustrative image — Chapter 5: Mental, behavioral and neurodevelopmental disorders (F01–F99) — illustrative image

What this code means

Dysthymia (persistent depressive disorder) is a long-lasting, lower-grade depressed mood lasting two years or more.

Also called: dysthymia, persistent depressive disorder.

When this code is used

Used for dysthymia.

Where it sits in ICD-10-CM

Code F34.1 belongs to Chapter 5: Mental, behavioral and neurodevelopmental disorders, which covers codes F01–F99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Fatigue

Frequently asked questions

What is ICD-10-CM code F34.1?

F34.1 is the ICD-10-CM diagnosis code for “Dysthymic disorder”. Dysthymia (persistent depressive disorder) is a long-lasting, lower-grade depressed mood lasting two years or more.

When is code F34.1 used?

Used for dysthymia. It belongs to Chapter 5 of ICD-10-CM (Mental, behavioral and neurodevelopmental disorders).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.