Is ICD-10-CM code F39 billable?

Yes, F39 (Unspecified mood [affective] disorder) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code F39 belong to?

F39 belongs to Chapter 5 of the ICD-10-CM tabular list: F01–F99 (Mental, Behavioral and Neurodevelopmental Disorders).

F39Billable

Unspecified mood [affective] disorder

Mental, Behavioral and Neurodevelopmental Disorders·Mood [affective] disorders (F30-F39)·category·FY 2026

CH5 Parent Instructions

Includes

disorders of psychological development

Excludes2(Not included here. Code separately if applicable.)

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Instructional Notes

Includes

Affective psychosis NOS

Clinical Hierarchy

BillableHas subcodes

CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

F30-F39Mood [affective] disorders (F30-F39)

F39Unspecified mood [affective] disorderBillable

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 885

Psychoses