ICD-10 Code F89 – Unspecified Disorder of Psychological Development (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F89 – Unspecified disorder of psychological development
What it is
F89 identifies a developmental disorder affecting psychological development, but the record does not specify a more precise type. Use it when documentation confirms a developmental problem and no clearer diagnosis is available.
Clinical signs
Clinical features vary; refer to documentation. Records may describe delayed or atypical development in areas such as language, learning, coordination, or social functioning without enough detail for a specific developmental disorder.
When to use this code
Use F89 when the clinician documents an unspecified disorder of psychological development and the chart lacks enough detail to assign a more specific code. It is appropriate when the assessment is developmental but the subtype is not named. Check documentation if the note suggests another defined disorder.
Do not use for
Do not use F89 when the documentation clearly supports a specific developmental disorder or another mental, behavioral, or neurodevelopmental diagnosis. Do not use it merely because the record is incomplete if a more precise code is documented elsewhere.
Coding tip
Query for specificity before defaulting to F89, because unspecified coding should reflect documented uncertainty, not missing review.