2025
ICD-10-CM
Diagnosis
Code

X31 Exposure to excessive natural cold

Non-billable
2016–2025

X31 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Exposure to excessive natural cold.

Inclusion term

Excessive cold as the cause of chilblains NOS
Excessive cold as the cause of immersion foot or hand
Exposure to cold NOS
Exposure to weather conditions

Type 1 excludes

Cold of man-made origin (W93.-)
Contact with or inhalation of dry ice (W93.-)
Contact with or inhalation of liquefied gas (W93.-)

Seventh character note

The appropriate 7th character is to be added to code X31

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