F78.A9CurrentBillable / specific

Other genetic related intellectual disability

Code-level instructions

Code also

, if applicable, any associated disorders

F70-F79 · Inherited instructions

Code first

any associated physical or developmental disorders

Excludes 1

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

Excludes 2 · 1

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

Excludes 2

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

Claims & coverage

Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.

When ICD-10-CM is required

For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.

Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.

Official coding guidelines → · CMS ↗

MS-DRG · 43.1 · 884

Grouping depends on the complete encounter and CMS grouper logic.

884 · Organic Disturbances and Intellectual Disability

2026-04-01 – 2026-09-30

CMS · MS-DRG 43.1

Check Medicare coverage ↗

First observed · 2021-10-01

Code history

Latest recorded change · FY2022

ChangedUnchanged

FY2022

Effective from 2021-10-01

Added

Other genetic related intellectual disability

Billable diagnosis code

CDC/NCHS · FY2022

All editions (11)

All editions	Effective from	Code history
FY2022	2021-10-01	Added
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Code-level instructions

Code also

, if applicable, any associated disorders

Inherited instructions

F70-F79 · Intellectual Disabilities (F70-F79)

Excludes 1

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

Code first

any associated physical or developmental disorders

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

Includes

disorders of psychological development

Excludes 2

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

Official index references (22)

Disability, disabilities (22)

Official conversion history

Historical assignments from the CDC conversion table support data retrieval. They do not authorize substituting a previous code for the current code.

Release dates 2021-10-01

Previous assignment: F78

Related codes

Other entries in the same category; these are not automatic substitutes.

Code	Description	Category · further specificity required
F78.A1	SYNGAP1-related intellectual disability	Billable / specific

Official titles and instructions are preserved in their source language. Official sources ↗