Is ICD-10-CM code F79 billable?

Yes, F79 (Unspecified intellectual disabilities) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code F79 belong to?

F79 belongs to Chapter 5 of the ICD-10-CM tabular list: F01–F99 (Mental, Behavioral and Neurodevelopmental Disorders).

F79Billable

Unspecified intellectual disabilities

Mental, Behavioral and Neurodevelopmental Disorders·Intellectual Disabilities (F70-F79)·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)

F70-F79 Parent Instructions

Excludes1(Not coded here. Use a different code.)

borderline intellectual functioning, IQ above 70 to 84 (R41.83)

Code First

any associated physical or developmental disorders

Instructional Notes

Includes

Mental deficiency NOS
Mental subnormality NOS

Clinical Hierarchy

BillableHas subcodes

CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

F70-F79Intellectual Disabilities (F70-F79)

F79Unspecified intellectual disabilitiesBillable

MS-DRG Classification

2026 v43.1

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

DRG 884

Organic Disturbances and Intellectual Disability