F79 – Unspecified intellectual disabilities
ICD-10-CM 2027 diagnosis code · Intellectual Disabilities
ICD-10-CM code
F79
- Code
F79(claims format:F79)- Description
- Unspecified intellectual disabilities
- 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
Notes for F79
Applicable to:
- Mental deficiency NOS
- Mental subnormality NOS
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 F79
Entries in the ICD-10-CM alphabetic index that lead to this code:
Frequently asked questions
What is ICD-10 code F79?
F79 is the ICD-10-CM code for unspecified intellectual disabilities, in the block F70-F79 (Intellectual Disabilities).
Is F79 a billable code?
Yes. F79 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
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.