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F43.0

Acute stress reaction

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 1 never code together
F01-F99chapter
Excludes2
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)R00-R99

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 7
F43.0code
Inclusion terms
  • Acute crisis reaction
  • Acute reaction to stress
  • Combat and operational stress reaction
  • Combat fatigue
  • Crisis state
  • Psychic shock
F01-F99chapter
Includes
  • disorders of psychological development
Index entries leading here 17
  • Situational
    • disturbance (transient) — see Disorder, adjustment
    • reaction — see Disorder, adjustment
  • Disturbance (s) — see also Disease
    • situational (transient) — see also Disorder, adjustment
  • Disorder (of) — see also Disease
  • Reaction — see also Disorder
    • stress (severe) F43.9
      • acute (agitation) ("daze") (disorientation) (disturbance of consciousness) (flight reaction) (fugue) F43.0
    • combat and operational stress F43.0
    • crisis, acute F43.0
  • Crisis
    • acute reaction F43.0
    • emotional — see also Disorder, adjustment
      • acute reaction to stress F43.0
    • state (acute reaction) F43.0
  • State (of)
  • Exhaustion, exhaustive (physical NEC) R53.83
  • Battle exhaustion F43.0
  • Fatigue R53.83
  • Combat fatigue F43.0
  • Delirium, delirious (acute or subacute) (not alcohol- or drug-induced) R41.0
  • Psychosis, psychotic F29
  • Fugue R68.89
    • reaction to exceptional stress (transient) F43.0
  • Panic (attack) (state) F41.0
    • reaction to exceptional stress (transient) F43.0
  • Shock R57.9
  • Stupor (catatonic) R40.1
    • reaction to exceptional stress (transient) F43.0
  • Shellshock (current) F43.0
Alongside this code 4 same parent — F43
F43.1 Post-traumatic stress disorder (PTSD) category F43.2 Adjustment disorders category F43.8 Other reactions to severe stress category F43.9 Reaction to severe stress, unspecified
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
F43
Block
F40-F48
Siblings
4

Present FY2024–FY2027.