R21 Rash and other nonspecific skin eruption

Billable ICD-10-CM code, FY2026.

Includes

• rash NOS

Excludes1 (never code together)

• specified type of rash- code to condition
• vesicular eruption (R23.8)

Applies from R21 Rash and other nonspecific skin eruption

Includes

• rash NOS

Excludes1 (never code together)

• specified type of rash- code to condition
• vesicular eruption (R23.8)

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 782.1 Rash and other nonspecific skin eruption

Diagnosis Index entries for R21

• Eruption › skin (nonspecific)
• Rash (toxic)
• Rash (toxic) › rose
• Rose › rash

Nearby codes

• R21 Rash and other nonspecific skin eruption (this code)