F43.9
Reaction to severe stress, unspecified
Billable code
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · F43.9
Synonyms
Trauma and stressor-related disorder, NOS Unspecified trauma and stressor-related disorder
Inherited from chapter 5Mental, Behavioral and Neurodevelopmental disorders
Includes
disorders of psychological development
Excludes 2
symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Official Guidelines for F43.9
FY 2026 ›Find F43.9 in the alphabetic index
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