F78.A9 Other genetic related intellectual disability

The ICD-10-CM code for Other genetic related intellectual disability is F78.A9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

Section

F70-F79: Intellectual Disabilities (F70-F79)

Category F78

4 codes (2 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F78.A9:

• Disability, disabilities › intellectual › specified level NEC
• Disability, disabilities › intellectual › genetic related
• Disability, disabilities › intellectual › autosomal dominant
• Disability, disabilities › intellectual › autosomal recessive
• Disability, disabilities › intellectual › X-linked (syndromic) (Bain type)
• Disability, disabilities › intellectual › in › autosomal dominant mental retardation
• Disability, disabilities › intellectual › genetic related › specified NEC
• Disability, disabilities › intellectual › in › autosomal recessive mental retardation

U.S. Hospital Utilization

• An estimated 870 U.S. inpatient stays in 2023 included F78.A9 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Pain disorders related to psychological factors (TOC entry)

a. Pain disorders related to psychological factors ..................................................................... 43

Psychoactive substance use disorders (TOC entry)

b. Mental and behavioral disorders due to psychoactive substance use ................................... 43

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)