Reaction to severe stress, and adjustment disorders
In Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48), chapter 5: Mental, Behavioral and Neurodevelopmental Disorders
14 billable codes under F43: none are a CC or MCC; none map to an HCC.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers psychological pain disorders, substance use, abuse, dependence and remission, factitious disorder including Munchausen by proxy, and dementia severity.
- Pain disorders related to psychological factors (page 43)
- Mental and behavioral disorders due to psychoactive substance use (page 43)
- Factitious Disorder (page 44)
- Dementia (page 45)
All codes under F43
F43 can't be used on a claim. Pick a billable code below; grey headings group them.
- F43.0Acute stress reaction
- F43.1Post-traumatic stress disorder (PTSD)
- F43.10Post-traumatic stress disorder, unspecified
- F43.11Post-traumatic stress disorder, acute
- F43.12Post-traumatic stress disorder, chronic
- F43.2Adjustment disorders
- F43.20Adjustment disorder, unspecified
- F43.21Adjustment disorder with depressed mood
- F43.22Adjustment disorder with anxiety
- F43.23Adjustment disorder with mixed anxiety and depressed mood
- F43.24Adjustment disorder with disturbance of conduct
- F43.25Adjustment disorder with mixed disturbance of emotions and conduct
- F43.29Adjustment disorder with other symptoms
- F43.8Other reactions to severe stress
- F43.81Prolonged grief disorder
- F43.89Other reactions to severe stress
- F43.9Reaction to severe stress, unspecified
F43 MS-DRGs
As the principal diagnosis, the billable codes under F43 group to MS-DRG 882, 880, or 881 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 882 Neuroses Except Depressive (12 of 14 codes)
- DRG 880 Acute Adjustment Reaction and Psychosocial Dysfunction (1 of 14 codes)
- DRG 881 Depressive Neuroses (1 of 14 codes)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Stress
Stress is how your brain and body respond to a challenge or demand. When you are stressed, your body releases certain hormones. Hormones are chemicals that travel in your bloodstream and control how different parts of your body work. The hormones that are released when you are stressed make you alert and ready to act. They can raise your blood pressure, heart rate, and blood glucose (blood sugar) levels. This response is sometimes called a "fight or flight" response.
Read more about stress on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.