Billable / Specific Code
ICD-10-CM F40.228 is the diagnosis code for Other natural environment type phobia. 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 F40.228 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, F40.228 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
F40.228 is the ICD-10-CM diagnosis code for "Other natural environment type phobia". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of F40.228 is F40.22 ("Natural environment type phobia"). F40.228 provides a more specific classification within this category.
F40.228 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 F40.228 when the patients documented diagnosis matches "Other natural environment type phobia" 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 Other natural environment type phobia is F40.228.
Yes, F40.228 can be used as a primary diagnosis code since it is billable and specific.
F40.228 is in Chapter 5 of the ICD-10-CM Tabular List.
Yes, F40.228 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.