NPI Atlas

F43.8 – Other reactions to severe stress

ICD-10-CM 2027 diagnosis code · Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders

Non-billable header

ICD-10-CM code F43.8

Code: F43.8 (claims format: F438)
Description: Other reactions to severe stress
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F40-F48 Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
Parent codes: F43

Billable codes under F43.8

F43.8 is a header code and cannot be used on claims. Choose the most specific code:

F43.81 – Prolonged grief disorderBillable
F43.89 – Other reactions to severe stressBillable

Notes for F43.8

Applicable to:

Other specified trauma and stressor-related disorder

Related codes in F43

F43.0 – Acute stress reactionBillable
F43.1 – Post-traumatic stress disorder (PTSD)Header
F43.2 – Adjustment disordersHeader
F43.9 – Reaction to severe stress, unspecifiedBillable

Frequently asked questions

What is ICD-10 code F43.8?

F43.8 is the ICD-10-CM code for other reactions to severe stress, in the block F40-F48 (Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders).

Is F43.8 a billable code?

No. F43.8 is a header code with more specific child codes; report one of the billable codes listed above.

What category does F43.8 belong to?

It belongs to category F43 – Reaction to severe stress, and adjustment disorders.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.