Is ICD-10-CM code F59 billable?

Yes, F59 (Unspecified behavioral syndromes associated with physiological disturbances and physical factors) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code F59 belong to?

F59 belongs to Chapter 5 of the ICD-10-CM tabular list: F01–F99 (Mental, Behavioral and Neurodevelopmental Disorders).

F59Billable

Unspecified behavioral syndromes associated with physiological disturbances and physical factors

Mental, Behavioral and Neurodevelopmental Disorders·Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)·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

Psychogenic physiological dysfunction NOS

Clinical Hierarchy

BillableHas subcodes

CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

F50-F59Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)

F59Unspecified behavioral syndromes associated with physiological disturbances and physical factorsBillable

MS-DRG Classification

2026 v43.1

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

DRG 887

Other Mental Disorder Diagnoses