2026 ICD-10-CM Diagnosis Code F78Other intellectual disabilities

ICD-10-CM Codes›F01–F99›F70-F79›F78

ICD-10-CM F78
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F78 is a non-billable ICD-10-CM category code for other intellectual disabilities, so it cannot be submitted on claims. Use a more specific code from this category instead, such as F78.A1 and F78.A9. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neurodevelopmental disorders.

Code Identity

ICD-10-CM Code
F78
Billable Status
No — Non-Billable Category
Code Describes
Other intellectual disabilities
Chapter
F70-F79
Intellectual disabilities

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF70-F79Intellectual disabilities
CategoryF78Other intellectual disabilities
This CodeF78Other intellectual disabilities

Specific Coding for Other intellectual disabilitiesOverview

Non-specific codes like F78 require more characters. Use one of these billable codes instead:

  • F78.A for Other genetic related intellectual disabilities

  • Use F78.A1 for SYNGAP1-related intellectual disability

  • Use F78.A9 for Other genetic related intellectual disability

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD014
Neurodevelopmental disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Developmental Disabilities

Developmental disabilities are conditions that are usually present at birth. They can affect a child's growth and development. These conditions can cause physical, learning, language, or behavior issues. They can include:

The full article covers:

  • What are developmental disabilities?
  • What causes developmental disabilities?
  • How are developmental disabilities diagnosed?
  • What are the treatments for developmental disabilities?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F78 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
319 Intellect disability NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2021No changes
FY 2022RevisedCode revised
FY 2023–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F78Overview

Is F78 (Other intellectual disabilities) a billable code?

No. This is a category header that groups the codes for other intellectual disabilities, and headers cannot be submitted on claims. Claims for other intellectual disabilities need a more specific code from this category, such as F78.A1 and F78.A9.

What is the ICD-9 equivalent of F78?

Under the General Equivalence Mappings, other intellectual disabilities converts to ICD-9-CM 319 (intellect disability NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.