W94.1Header code — not billable
Exposure to prolonged low air pressure
- Chapter
- 20. External causes of morbidity
- Category
- W94
- Effective date
- October 1, 2026
Frequently asked questions
What is ICD-10 code W94.1?
W94.1 is an ICD-10-CM diagnosis code for Exposure to prolonged low air pressure.
Is W94.1 a billable code?
No. W94.1 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is W94.1 in?
W94.1 falls under Chapter 20: External causes of morbidity.
When did W94.1 become effective?
W94.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.