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X39.0

Non-billable

Exposure to natural radiation

X39.0 is the ICD-10-CM code for Exposure to natural radiation. It is a non-billable category code — use a more specific child code such as X39.01 for billing.

Status
Header (non-billable)
Chapter
V00-Y99
Parent
X39
Subcodes
2
Edition
FY2026

V00-Y99 External causes of morbidity

What this means — in plain language

MedlinePlus · NIH

What is radiation? Radiation is energy. It travels in the form of energy waves or high-speed particles. Radiation can occur naturally or be man-made. There are two types: Non-ionizing radiation, which includes radio waves, cell phones, microwaves, infrared radiation and visible light Ionizing radiation, which includes ultraviolet radiation, radon , x-rays , and gamma rays What are the sources of radiation exposure?…

Read more about Radiation Exposure at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •contact with and (suspected) exposure to radon and other naturally occurring radiation (Z77.123)
  • •exposure to man-made radiation (W88-W90)
  • •exposure to sunlight (X32)

Frequently asked questions

What is ICD-10 code X39.0?
X39.0 is the ICD-10-CM code for "Exposure to natural radiation". It falls under V00-Y99 External causes of morbidity.
Is X39.0 a billable code?
No — X39.0 is a non-billable header code. Use a more specific child code (such as X39.01) for billing.
What are the subcodes of X39.0?
X39.0 has 2 more specific child codes, including X39.01, X39.08.
What is excluded from X39.0?
Excludes1 (not coded here): contact with and (suspected) exposure to radon and other naturally occurring radiation (Z77.123); exposure to man-made radiation (W88-W90); exposure to sunlight (X32).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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