X39Not billable, use a more specific code below
Exposure to other forces of nature
In Exposure to forces of nature (X30-X39), chapter 20: External Causes of Morbidity
9 billable codes under X39: none are a CC or MCC; none map to an HCC.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under X39
X39 can't be used on a claim. Pick a billable code below; grey headings group them.
- X39.0Exposure to natural radiation
- X39.01Exposure to radon
- X39.01XAExposure to radon, initial encounter
- X39.01XDExposure to radon, subsequent encounter
- X39.01XSExposure to radon, sequela
- X39.08Exposure to other natural radiation
- X39.08XAExposure to other natural radiation, initial encounter
- X39.08XDExposure to other natural radiation, subsequent encounter
- X39.08XSExposure to other natural radiation, sequela
- X39.8Other exposure to forces of nature
- 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
X39 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to X39
Notes on these codes point to X39.
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.