Non-Billable / Non-Specific Code
ICD-10-CM F43.8 is the diagnosis code for Other reactions to severe stress. 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 non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where F43.8 sits in the ICD-10-CM classification helps ensure proper coding:
No, F43.8 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
F43.8 is the ICD-10-CM diagnosis code for "Other reactions to severe stress". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of F43.8 is F43 ("Reaction to severe stress, and adjustment disorders"). F43.8 provides a more specific classification within this category.
F43.8 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.
F43.8 has 2 sub-code(s) that provide more specific detail: F43.81, F43.89.
Use F43.8 when the patients documented diagnosis matches "Other reactions to severe stress" 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 reactions to severe stress is F43.8.
No, F43.8 is non-billable. Use a more specific sub-code for primary diagnosis billing.
F43.8 is in Chapter 5 of the ICD-10-CM Tabular List.
Yes, F43.8 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.