ICD-10-CM Code for Mood Disorder
The ICD-10-CM code for mood disorders is F3, with specific subcategories depending on the exact diagnosis (e.g., F31 for bipolar affective disorder, F32 for depressive episode, F33 for recurrent depressive disorder).
Understanding the ICD-10-CM Structure for Mood Disorders
In ICD-10-CM, mood (affective) disorders are classified under the F3 category 1, 2. This broad category contains seven main subcategories that are further divided into specific diagnostic codes 1.
Primary Episodic Mood Disorders:
- F30: Manic episode
- F31: Bipolar affective disorder
- F32: Depressive episode
- F33: Recurrent depressive disorder
Persistent Mood Disorders:
- F34.0: Cyclothymia
- F34.1: Dysthymia
Additional Related Categories:
Coding Specificity Requirements
You must code to the highest level of specificity available based on your clinical documentation. The F3 category alone is insufficient for billing and documentation purposes. The reliability of 2-character diagnoses (like F31 or F33) is excellent with kappa values of 0.93, though 3-character subcategories show more variability 3.
Common Pitfalls:
- Using only the 2-character code (F31) when a more specific 3-character or higher code is documented
- Confusing dysthymia (F34.1) coding, which historically has shown lower inter-rater reliability (kappa 0.22) and requires careful attention to diagnostic criteria 3
- Relying solely on DSM-5-TR coding advice rather than consulting ICD-10-CM directly, as the DSM provides limited guidance on the full range of available codes 4
Transition to ICD-11 Considerations
While ICD-10-CM remains the current standard in the United States, be aware that ICD-11 has introduced structural changes 5, 6:
- Dysthymia is now categorized as a depressive disorder rather than a persistent affective disorder
- Bipolar disorder is divided into type I and type II
- The concept of persistent affective disorders has been abandoned
For current clinical practice and billing in the U.S., continue using ICD-10-CM F3 codes with appropriate specificity based on your documented diagnosis.