ICD-10-CM F40.240 is the diagnosis code for Claustrophobia. This code falls under the section "Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders" 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.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where F40.240 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, F40.240 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
F40.240 is the ICD-10-CM diagnosis code for "Claustrophobia". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of F40.240 is F40.24 ("Situational type phobia"). F40.240 provides a more specific classification within this category.
F40.240 is located in Section F40-F48 — "Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders" within Chapter 5 of the ICD-10-CM Tabular List.
Use F40.240 when the patients documented diagnosis matches "Claustrophobia" 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 Claustrophobia is F40.240.
Yes, F40.240 can be used as a primary diagnosis code since it is billable and specific.
F40.240 is in Chapter 5 of the ICD-10-CM Tabular List.
Yes, F40.240 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.