ICD-10-CM 2027
ICD-10 code for Cyclothymic disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › cyclothymic”. Page updated September 29, 2026.
About coding Cyclothymic disorder
The ICD-10-CM code for Cyclothymic disorder is F34.0 (Cyclothymic disorder).
Within F34 (persistent mood [affective] disorders), F34.0 is specifically for Cyclothymic disorder. Related codes cover Dysthymic disorder (F34.1), other persistent mood [affective] disorders (F34.8) and persistent mood [affective] disorder, unspecified (F34.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 883 (Disorders of Personality and Impulse Control, relative weight 1.7697), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Cyclothymic disorder ICD-10 codes
What is the ICD-10 code for Cyclothymic disorder?
- F34.0 — Cyclothymic disorder.
Is F34.0 billable?
- Yes. F34.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F34.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F34.0 as a principal diagnosis.
Is F34.0 a CC or MCC?
- No. F34.0 is neither a CC nor an MCC under MS-DRG v44.0.