Official ICD-10-CM description: Rash and other nonspecific skin eruption
Common questions
Is R21 a billable code?
Yes. R21 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.
Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. About BillingBrief and our sources.
