ICD-10-CM code F79 describes unspecified intellectual disability. Intellectual disability where severity cannot be assessed (e.g., young children). It is a billable, specific code valid for claim submission. It is grouped under the “Intellectual & Developmental Disabilities” section of the mental, behavioral, and neurodevelopmental disorders chapter.
When to use F79
Use this group for intellectual disability, language and learning disorders, developmental coordination, and autism spectrum. Code severity where required and pair with developmental or therapy service codes as appropriate. For F79 specifically, intellectual disability where severity cannot be assessed (e.g., young children).
Documentation & billing
Document the severity level (especially for intellectual disability and autism spectrum) and the developmental domains affected. Note any co-occurring conditions.
Common pitfalls
- Coding intellectual disability without a severity level when it can be assessed.
- Using a legacy code such as Asperger disorder (F84.5) when the current autism spectrum framework applies.
- Failing to specify the speech or language domain affected.
Common search terms for F79
Clinicians often look up F79 using plain-language terms. This code maps to:
Frequently asked questions
What is ICD-10-CM code F79?
Unspecified intellectual disability. Intellectual disability where severity cannot be assessed (e.g., young children).
Is F79 a billable ICD-10-CM code?
Yes. F79 (Unspecified intellectual disability) is a billable, specific ICD-10-CM code that can be reported on a claim. Confirm the current official descriptor against the CDC code set and your payer’s policies before submitting.
What should I document to support F79?
Document the severity level (especially for intellectual disability and autism spectrum) and the developmental domains affected. Note any co-occurring conditions.