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Z77.123

Billable

Contact with and (suspected) exposure to radon and other naturally occurring radiation

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A person has been exposed to or is suspected of being exposed to radon gas or other naturally occurring radiation sources.

Coding Tips

  • Document the source of radiation exposure (residential radon, occupational exposure, geographic location with high radon levels).
  • This code is useful for documenting environmental risk factors in patients with lung cancer or respiratory concerns.

Excludes 2 — Not included here, may code separately

  • radiation exposure as the cause of a confirmed condition (W88-W90, X39.0-)
  • radiation sickness NOS (T66)

Code Hierarchy

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