ICD-10-CM · Chapter 18 · R00-R99
R21 Rash and other nonspecific skin eruption
Includes
- rash NOS
Excludes 1 (cannot be coded together)
- specified type of rash- code to condition
- vesicular eruption (R23.8)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit R21 directly on claims and documentation without a subcode extension.
Plain-language term for this code
The following entry in the US Medical Glossary corresponds to ICD-10-CM category R21:
- Rash — Sarpullido
Last reviewed: September 2026