MCMCB Pro
X32

X32Exposure to sunlight

Non-billable headerICD-10-CM

X32 is a non-billable header ICD-10-CM code for exposure to sunlight. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to code X32

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • man-made radiation (tanning bed) (W89)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)

Other codes that can never be billed with X32

These codes carry an Excludes1 note pointing at X32. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading X32 alone.

  • V93.2Heat exposure on board watercraft
  • W88Exposure to ionizing radiation
  • X30Exposure to excessive natural heat
  • X30.XXXAExposure to excessive natural heat, initial encounter
  • X30.XXXDExposure to excessive natural heat, subsequent encounter
  • X30.XXXSExposure to excessive natural heat, sequela
  • X39.0Exposure to natural radiation

Risk adjustment

X32 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How X32 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to X32.

  • Coup de soleil
  • Siriasis
  • Sunstroke
  • Exposuresunlight
  • Forces of naturesunlight
  • Overexposuresun(sunburn)
  • Radiationsun
  • Radiationlight sourcesnatural
  • Radiationultravioletnatural

Code to one of these instead X32

3 child codes. Green means billable.

Questions about X32

Is X32 a billable ICD-10-CM code?
No. X32 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does X32 sit in the tabular list?
External causes of morbidity (V00-Y99), in the block Exposure to forces of nature (X30-X39).
What cannot be coded together with X32?
X32 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 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.