X30Header code — not billable

Exposure to excessive natural heat

Chapter
20. External causes of morbidity
Category
X30
Effective date
October 1, 2026

Related codes in category X30

X30.XXXAExposure to excessive natural heat, initial encounterYesX30.XXXDExposure to excessive natural heat, subsequent encounterYesX30.XXXSExposure to excessive natural heat, sequelaYes

Frequently asked questions

What is ICD-10 code X30?

X30 is an ICD-10-CM diagnosis code for Exposure to excessive natural heat.

Is X30 a billable code?

No. X30 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is X30 in?

X30 falls under Chapter 20: External causes of morbidity.

When did X30 become effective?

X30 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to X30?

X30 belongs to category X30, which includes 3 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.