F78.A9 – Other genetic related intellectual disability
ICD-10-CM 2027 diagnosis code · Intellectual Disabilities
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:
- Disability, disabilities, intellectual, X-linked
- Disability, disabilities, intellectual, genetic related
- Disability, disabilities, intellectual, autosomal dominant
- Disability, disabilities, intellectual, autosomal recessive
- Disability, disabilities, intellectual, specified level NEC
- Disability, disabilities, intellectual, in, SETBP1 disorder
- Disability, disabilities, intellectual, with, pathogenic SATB2
- Disability, disabilities, intellectual, with, pathogenic CHAMP1
- Disability, disabilities, intellectual, with, pathogenic SETBP1
- Disability, disabilities, intellectual, with, pathogenic STXBP1
- Disability, disabilities, intellectual, with, pathogenic HNRNPH2
- Disability, disabilities, intellectual, in, SATB2-associated syndrome
- Disability, disabilities, intellectual, genetic related, specified NEC
- Disability, disabilities, intellectual, in, X-linked mental retardation
- Disability, disabilities, intellectual, genetic related, with, pathogenic SATB2
- Disability, disabilities, intellectual, in, STXBP1 encephalopathy with epilepsy
- Disability, disabilities, intellectual, genetic related, with, pathogenic SETBP1
- Disability, disabilities, intellectual, genetic related, with, pathogenic STXBP1
- Disability, disabilities, intellectual, genetic related, with, pathogenic CHAMP1
- Disability, disabilities, intellectual, in, autosomal dominant mental retardation
- Disability, disabilities, intellectual, genetic related, with, pathogenic HNRNPH2
- Disability, disabilities, intellectual, in, autosomal recessive mental retardation
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.