X30
⚠ Non-billable
Exposure to excessive natural heat
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
X30
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- Exposure to excessive heat as the cause of sunstroke
- Exposure to heat NOS
Excludes1 — never code together
- excessive heat of man-made origin (W92)
- exposure to man-made radiation (W89)
- exposure to sunlight (X32)
- exposure to tanning bed (W89)
7th character
- The appropriate 7th character is to be added to code X30
Frequently asked questions
What is ICD-10 code X30?
ICD-10-CM code X30 represents Exposure to excessive natural heat. It is a non-billable header code requiring a more specific subcategory in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is X30 billable?
No. X30 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is X30 in?
X30 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
Related codes in the X30 category
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