F78.A9 – Other genetic related intellectual disability

ICD-10-CM 2027 diagnosis code · Intellectual Disabilities

Billable code

ICD-10-CM code F78.A9
Code
F78.A9 (claims format: F78A9)
Description
Other genetic related intellectual disability
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block
F70-F79 Intellectual Disabilities
Parent codes
F78 › F78.A

Notes for F78.A9

Code also:
  • , if applicable, any associated disorders

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block F70-F79

Excludes1 (not coded here):
  • borderline intellectual functioning, IQ above 70 to 84 (R41.83)
Code first:
  • any associated physical or developmental disorders

Index terms for F78.A9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in F78.A

Frequently asked questions

What is ICD-10 code F78.A9?

F78.A9 is the ICD-10-CM code for other genetic related intellectual disability, in the block F70-F79 (Intellectual Disabilities).

Is F78.A9 a billable code?

Yes. F78.A9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F78.A9 belong to?

It belongs to category F78 – Other intellectual disabilities.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.