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ICD-10-CM Code R21
Rash and other nonspecific skin eruption

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

R21 is a billable ICD code used to specify a diagnosis of rash and other nonspecific skin eruption. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code R21 is used to code Rash

A rash is a change of the skin which affects its color, appearance, or texture.

Specialty: Dermatology
MeSH Code: D005076
ICD 9 Code: 782.1

A diffuse rash on the back of a male

Source: Wikipedia

Coding Notes for R21 Info for medical coders on how to properly use this ICD-10 code

Code Includes Notes:
Includes notes further define, or give examples of, conditions included in the section.
Rash NOS
Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Specified type of rash- code to condition
Vesicular eruption - instead, use code R23.8

MS-DRG Mapping

  • DRG Group #606-607 - Minor skin disorders with MCC.
  • DRG Group #606-607 - Minor skin disorders without MCC.

Related Concepts SNOMET-CT

  • Complaining of a rash (finding)
  • On examination - weals present (disorder)

Coding Advice SNOMET-CT

  • Possible requirement for an external cause code

ICD-10-CM Alphabetical Index References for 'R21 - Rash and other nonspecific skin eruption'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code R21. Click on any term below to browse the alphabetical index.

Rash(toxic) (R21)
Rash(toxic) (R21) +


Rash and other nonspecific skin eruption (exact match)

This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code 782.1 was previously used, R21 is the appropriate modern ICD10 code.

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/R21