2026 ICD-10-CM Diagnosis Code Z81.0Family history of intellectual disabilities
Z81.0 is a billable ICD-10-CM diagnosis code for family history of intellectual disabilities. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as family history of intellectual disability. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Family history of disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z81.0.
Present on Admission (POA)Billing
Z81.0 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Family history of intellectual disability
- Family history of learning disability
- Father with learning disability
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- History
- family (of) - See Also: History, personal (of);
- intellectual disability - Z81.0
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- History
- family (of)
- intellectual disability
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 Z81.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z81.0Overview
Is Z81.0 (Family history of mental and behavioral disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report family history of intellectual disabilities on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z81.0 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because family history of intellectual disabilities describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z81.0 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for family history of intellectual disabilities on inpatient claims.
What is the ICD-9 equivalent of Z81.0?
Under the General Equivalence Mappings, family history of intellectual disabilities converts to ICD-9-CM V18.4 (fm hx-intellect disablty). The mapping is a direct match.
