---
title: "ICD-10-CM F34.0: Cyclothymic disorder | BillingBrief"
description: "F34.0 is cyclothymic disorder, one of the persistent mood disorders. Records may also call it cyclothymia, cyclothymic personality, cycloid personality, or…"
canonical: "https://billingbrief.com/icd10/f34.0/"
language: "en"
---

# F34.0 Cyclothymic disorder

ICD-10-CM · [CMS code reference](#source)

F34.0 is cyclothymic disorder, one of the persistent mood disorders. Records may also call it cyclothymia, cyclothymic personality, cycloid personality, or affective personality disorder.

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Also covers

-   Affective personality disorder
-   Cycloid personality
-   Cyclothymia
-   Cyclothymic personality

## Related codes

-   [`F34.1` Dysthymic disorder ICD-10-CM](https://billingbrief.com/icd10/f34.1/)
-   [`F34.81` Disruptive mood dysregulation disorder ICD-10-CM](https://billingbrief.com/icd10/f34.81/)
-   [`F34.89` Other specified persistent mood disorders ICD-10-CM](https://billingbrief.com/icd10/f34.89/)
-   [`F34.9` Persistent mood \[affective\] disorder, unspecified ICD-10-CM](https://billingbrief.com/icd10/f34.9/)

## Common questions

### Is F34.0 a billable code?

Yes. F34.0 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

F34 Persistent mood \[affective\] disorders

Chapter

Mental, behavioral and neurodevelopmental disorders

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).