W99 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Exposure to other man-made environmental factors.
Seventh character note
The appropriate 7th character is to be added to code W99
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