X39.0Header code — not billable
Exposure to natural radiation
- Chapter
- 20. External causes of morbidity
- Category
- X39
- Effective date
- October 1, 2026
Related codes in category X39
X39Exposure to other forces of natureX39.01Exposure to radonX39.01XAExposure to radon, initial encounterYesX39.01XDExposure to radon, subsequent encounterYesX39.01XSExposure to radon, sequelaYesX39.08Exposure to other natural radiationX39.08XAExposure to other natural radiation, initial encounterYesX39.08XDExposure to other natural radiation, subsequent encounterYesX39.08XSExposure to other natural radiation, sequelaYesX39.8Other exposure to forces of natureX39.8XXAOther exposure to forces of nature, initial encounterYesX39.8XXDOther exposure to forces of nature, subsequent encounterYes
Frequently asked questions
What is ICD-10 code X39.0?
X39.0 is an ICD-10-CM diagnosis code for Exposure to natural radiation.
Is X39.0 a billable code?
No. X39.0 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 X39.0 in?
X39.0 falls under Chapter 20: External causes of morbidity.
When did X39.0 become effective?
X39.0 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to X39.0?
X39.0 belongs to category X39, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.