All ICD10 Codes

F43

Non-Billable
ChapterF01–F99
Rankcategory
Official Description

Reaction to severe stress, and adjustment disorders

Use a more specific code (2 billable, 3 non-billable)
F43.0Acute stress reactionF43.1Post-traumatic stress disorder (PTSD)has subcodesF43.2Adjustment disordershas subcodesF43.8Other reactions to severe stresshas subcodesF43.9Reaction to severe stress, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99).

CH5 Parent Instructions

Includes
  • disorders of psychological development
Excludes2(Not included here. Code separately if applicable.)
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Clinical Hierarchy

BillableHas subcodes
CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
F40-F48Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48)
F43Reaction to severe stress, and adjustment disordersNot billable
F43.0Acute stress reactionBillable
F43.1Post-traumatic stress disorder (PTSD)Subcodes
F43.2Adjustment disordersSubcodes
F43.8Other reactions to severe stressSubcodes
F43.9Reaction to severe stress, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to F43:

chapterCH5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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