2025
ICD-10-CM
Diagnosis
Code

X30 Exposure to excessive natural heat

Non-billable
2016–2025

X30 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Exposure to excessive natural heat.

Inclusion term

Exposure to excessive heat as the cause of sunstroke
Exposure to heat NOS

Type 1 excludes

Excessive heat of man-made origin (W92)
Exposure to man-made radiation (W89)
Exposure to sunlight (X32)
Exposure to tanning bed (W89)

Seventh character note

The appropriate 7th character is to be added to code X30

Seventh character extensions

A: initial encounter
D: subsequent encounter
S: sequela

Codes

Versions

2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code