MCMedicalCodingSoftware
X39.01XD

X39.01XD: Exposure to radon, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

X39.01XD is a billable, specific ICD-10-CM code for exposure to radon, subsequent encounter. It is valid for submission on a claim.

Check X39.01XD with the rest of the claim: free scrubber

7th character "D": subsequent encounter

The appropriate 7th character is to be added to each code from category X39

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1 inherited from the categories above X39.01XD

A category’s note binds every code beneath it.

Written on X39.0: Exposure to natural radiation

  • 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)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under X39.01

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.