ICD-10-CM F51.3 is the diagnosis code for Sleepwalking [somnambulism]. This code falls under the section "Behavioral syndromes associated with physiological disturbances and physical factors" within Chapter 5 — Mental, Behavioral and Neurodevelopmental disorders (F01-F99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where F51.3 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, F51.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
F51.3 is the ICD-10-CM diagnosis code for "Sleepwalking [somnambulism]". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of F51.3 is F51 ("Sleep disorders not due to a substance or known physiological condition"). F51.3 provides a more specific classification within this category.
F51.3 is located in Section F50-F59 — "Behavioral syndromes associated with physiological disturbances and physical factors" within Chapter 5 of the ICD-10-CM Tabular List.
Use F51.3 when the patients documented diagnosis matches "Sleepwalking [somnambulism]" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Sleepwalking [somnambulism] is F51.3.
Yes, F51.3 can be used as a primary diagnosis code since it is billable and specific.
F51.3 is in Chapter 5 of the ICD-10-CM Tabular List.
Yes, F51.3 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.