F43.9
F43.9: Reaction to severe stress, unspecified
Billable / specific codeICD-10-CM
F43.9 is a billable, specific ICD-10-CM code for reaction to severe stress, unspecified. It is valid for submission on a claim.
Check F43.9 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Trauma and stressor-related disorder, NOS
- Unspecified trauma and stressor-related disorder
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
F43.9 is named in 5 Medicare coverage policies: 4 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which one applies depends on your Medicare contractor.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A56645Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing
- A57130Billing and Coding: Psychiatric Codes
- A57480Billing and Coding: Psychiatry and Psychology Services
Alphabetic index entries that lead here
- Stress
- Disorder›stress
- Disorder›trauma and stressor-related NOS
- Reaction›stress(severe)
- Stress›reaction
- Disorder›trauma and stressor-related NOS›unspecified
Code history
Unchanged in every release from FY2024 to FY2027.