F34.1 ICD-10-CA code: Dysthymia
F34.1 is the ICD-10-CA code for “Dysthymia” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
F34.1Dysthymia
ICD-10-CA · Canada · Also written F341
Index terms
Entries in CIHI’s alphabetical index that lead to F34.1. Searching the index by the condition the note names is how coders reach this code.
- Depression, nervous
- Depression, neurotic
- Disorder (of), dysthymic
- Depression, psychoneurotic
- Depression, anxiety, persistent
- Personality (disorder), depressive
- Personality (disorder), hypothymic
- State (of), depressive NEC, neurotic
- Disorder (of), personality, depressive
- Disorder (of), personality, hypothymic
- Neurosis, neurotic, depressive (reaction) (type)
Notes for F34.1
As CIHI prints them, with any note F34.1 takes from the headings above it.
Includes
- Depressive:• neurosis• personality disorderNeurotic depressionPersistent anxiety depression
- Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)
Excludes
Conditions classified elsewhere.
- Anxiety depression (mild or not persistent) (F41.2)
- Symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)From Chapter 5: Mental and behavioural disorders (F00-F99)
Note
- A chronic depression of mood, lasting at least several years, which is not sufficiently severe, or in which individual episodes are not sufficiently prolonged, to justify a diagnosis of severe, moderate, or mild recurrent depressive disorder (F33.-).
- Persistent and usually fluctuating disorders of mood in which the majority of the individual episodes are not sufficiently severe to warrant being described as hypomanic or mild depressive episodes. Because they last for many years, and sometimes for the greater part of the patient's adult life, they involve considerable distress and disability. In some instances, recurrent or single manic or depressive episodes may become superimposed on a persistent affective disorder.From F34 Persistent mood [affective] disorders
- This block contains disorders in which the fundamental disturbance is a change in affect or mood to depression (with or without associated anxiety) or to elation. The mood change is usually accompanied by a change in the overall level of activity; most of the other symptoms are either secondary to, or easily understood in the context of, the change in mood and activity. Most of these disorders tend to be recurrent and the onset of individual episodes can often be related to stressful events or situations.From F30-F39 Mood [affective] disorders
Where F34.1 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F30-F39Mood [affective] disorders
- 3Category F34Persistent mood [affective] disorders
- 4Valid code F34.1Dysthymia
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code F34.1 mean?
F34.1 is the ICD-10-CA code for “Dysthymia” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is F34.1 in ICD-10-CA?
F34.1 sits under F34 Persistent mood [affective] disorders, within F30-F39 Mood [affective] disorders, within Chapter 5: Mental and behavioural disorders (F00-F99).
What coding notes apply to F34.1?
ICD-10-CA lists Note, Includes, Excludes notes for F34.1, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.