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v1.0.0
ICD-10 Guide
DiagnosesAcute Stress Disorder

Acute Stress Disorder

ICD-10 Coding for Acute Stress Disorder(F43.0)

PRIMARY SPECIALTYPsychiatry
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Acute Stress Disorder?
Essential facts and insights about Acute Stress Disorder

Key Clinical Considerations:

  • Exposure to a traumatic event, leading to symptoms such as intrusive memories, avoidance behaviors, negative mood, dissociation, and hyperarousal.
  • No specific laboratory findings are required for diagnosis; however, psychological assessments may be utilized.
  • Physical examination may reveal signs of distress but is not diagnostic; focus is on psychological symptoms.
  • Imaging or procedural findings are not applicable for Acute Stress Disorder.
  • Symptoms must last for more than 3 days but less than 1 month following the traumatic event.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Documentation must include a detailed account of the traumatic event and the patient's response.
  • Specific terminology such as 'acute stress disorder' and symptom descriptions must be used.
  • Examples include: 'Patient reports intrusive thoughts about the traumatic event' or 'Patient exhibits avoidance of reminders of the trauma.'
  • Medical necessity must be established through documentation of the impact on daily functioning.
  • Quality measures may include documentation of symptom severity and treatment response.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a patient presents with symptoms following a traumatic event that meet the criteria for Acute Stress Disorder.
  • Do not use this code if symptoms persist for more than one month, as this may indicate Post-Traumatic Stress Disorder (PTSD).
  • Similar codes include F43.1 (Post-Traumatic Stress Disorder) and F43.2 (Adjustment Disorders), which have different criteria.
  • Common coding errors include misclassifying PTSD as Acute Stress Disorder; ensure symptom duration is accurately documented.
  • In complex cases, consider the patient's history and symptom duration to select the appropriate code.

Code Exclusions

Important Exclusions

  • Excludes PTSD (F43.1) if symptoms persist beyond one month.
  • Alternative codes for excluded conditions may include F41.1 (Generalized Anxiety Disorder) for anxiety symptoms.
  • Conditions are excluded to ensure accurate diagnosis and treatment planning.
  • Common exclusion mistakes include failing to document symptom duration accurately.
  • Related but distinct conditions include Acute Adjustment Disorder (F43.2) and other anxiety disorders.

Related ICD-10 Codes

Primary Codes
F43.0
Acute Stress Disorder
F43.1
Post-Traumatic Stress Disorder
Ancillary Codes
Z56.82
Differential Codes
F43.10
F43.11

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Psychiatry

Specialty Applications

  • Applies to individuals exposed to traumatic events such as accidents, assaults, or natural disasters.
  • Patient populations include all ages, with particular attention to those with prior trauma exposure or mental health history.
  • Clinical settings include outpatient mental health clinics, emergency departments, and inpatient psychiatric units.
  • Specialty-specific applications are relevant in psychiatry, psychology, and emergency medicine.
  • Treatment contexts include crisis intervention and trauma-focused therapy.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with Acute Stress Disorder based on reported traumatic event and symptomatology.'

Template 2

Template: 'Clinical presentation consistent with Acute Stress Disorder including intrusive memories and hyperarousal.'

Template 3

Template: 'Diagnostic criteria for Acute Stress Disorder met as evidenced by symptoms lasting less than one month.'

Template 4

Template: 'Treatment plan initiated for Acute Stress Disorder with cognitive behavioral therapy and support.'

Template 5

Template: 'Follow-up care for Acute Stress Disorder including monitoring of symptoms and treatment response.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include details of the traumatic event, symptoms, and their impact on functioning.

How does this differ from similar diagnoses?

Acute Stress Disorder symptoms occur within 3 days to 1 month post-trauma, while PTSD symptoms last longer.

What are common billing considerations?

Ensure that the diagnosis is supported by thorough documentation to optimize reimbursement.

What procedures are typically associated?

Related CPT codes may include psychotherapy sessions and trauma-focused interventions.

Are there any quality reporting implications?

Quality measures may include tracking symptom severity and treatment outcomes.