R21
BillableRash and other nonspecific skin eruption
R21 is the ICD-10-CM code for Rash and other nonspecific skin eruption. It is a billable, specific code valid for reimbursement.
- Status
- Billable
- Chapter
- R00-R99
- Edition
- FY2026
R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Includes
- •rash NOS
Excludes1 — not coded here
- •specified type of rash- code to condition
- •vesicular eruption (R23.8)
Frequently asked questions
- What is ICD-10 code R21?
- R21 is the ICD-10-CM code for "Rash and other nonspecific skin eruption". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
- Is R21 a billable code?
- Yes — R21 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from R21?
- Excludes1 (not coded here): specified type of rash- code to condition; vesicular eruption (R23.8).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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