R21 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Rash and other nonspecific skin eruption.
Includes
Rash NOS
Type 1 excludes
Specified type of rash- code to condition
Vesicular eruption (R23.8)
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