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F43

F43Reaction to severe stress, and adjustment disorders

Non-billable headerICD-10-CM

F43 is a non-billable header ICD-10-CM code for reaction to severe stress, and adjustment disorders. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with F43

These codes carry an Excludes1 note pointing at F43. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F43 alone.

  • R53.8Other malaise and fatigue
  • R57Shock, not elsewhere classified

Risk adjustment

F43 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead F43

5 child codes. Green means billable.

Questions about F43

Is F43 a billable ICD-10-CM code?
No. F43 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does F43 sit in the tabular list?
Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.