ICD-10-CM category
X39 Exposure to other and unspecified forces of nature
X39 is a category, not a billable code. Report one of the 9 complete codes below.
Codes in X39
- X39.01XAExposure to radon, initial encounter
- X39.01XDExposure to radon, subsequent encounter
- X39.01XSExposure to radon, sequela
- X39.08XAExposure to other natural radiation, initial encounter
- X39.08XDExposure to other natural radiation, subsequent encounter
- X39.08XSExposure to other natural radiation, sequela
- X39.8XXAOther exposure to forces of nature, initial encounter
- X39.8XXDOther exposure to forces of nature, subsequent encounter
- X39.8XXSOther exposure to forces of nature, sequela
Outside the US? X39 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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