Diagnosis Code


Code Information

Diagnosis Code: R21

Short Description: Rash and other nonspecific skin eruption

Long Description: Rash and other nonspecific skin eruption

The code R21 is VALID for claim submission

Code Classification:

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99)
    • Symptoms and signs involving the skin and subcutaneous tissue (R20-R23)
      • Rash and other nonspecific skin eruption (R21)
        • R21 Rash and other nonspecific skin eruption

Code Version: 2020 ICD-10-CM


  • Acute blistering eruption of skin
  • Acute desquamating eruption of skin
  • Acute discoid eruption of skin
  • Acute eruption of skin
  • Acute erythematous eruption of skin
  • Acute exudative skin eruption
  • Acute maculopapular eruption of skin
  • Acute papular eruption of skin
  • Application site rash
  • Blanching rash
  • Blisters beneath skin
  • Broken skin
  • Butterfly rash
  • C/O: a rash
  • Centrifugal rash
  • Centripetal rash
  • Disorder of skin co-occurrent with human immunodeficiency virus infection
  • Eruption
  • Eruption of female perineum
  • Eruption of skin co-occurrent with human immunodeficiency virus infection
  • Eruption of vulva
  • Exanthem caused by Chlamydophila psittaci
  • Generalized rash
  • Irritation symptom
  • Localized eruption of skin
  • Macular eruption
  • Maculopapular eruption
  • Micropapular weal
  • Morbilliform eruption
  • Multimorphic rash
  • Non-blanching rash
  • O/E - discoid rash
  • O/E - dribble rash
  • O/E - itchy rash
  • O/E - macules
  • O/E - macules present
  • O/E - rash present
  • O/E - scalp rash
  • O/E - weals present
  • Ornithosis
  • Papular eruption
  • Papular eruption of blacks
  • Phototherapy skin rash
  • Premycotic eruption
  • Rash of genitalia
  • Rash of groin
  • Rash of periwound skin
  • Rash of systemic lupus erythematosus
  • Rubelliform eruption
  • Skin disorder associated with AIDS
  • Skin rash associated with AIDS
  • Skin symptom
  • Southern tick-associated rash illness
  • Symptom of skin and integumentary tissue
  • Synchronous rash
  • Weal
  • Weal

Diagnostic Related Group(s)

The code R21 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Minor Skin Disorders With Mcc (606)
  • Minor Skin Disorders Without Mcc (607)

References to Index of Diseases and Injuries

The code R21 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Includes Notes:
    • rash NOS
  • Type 1 Excludes Notes:
    • specified type of rash- code to condition
    • vesicular eruption (R23.8)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
R21 Right Arrow 782.1 Nonspecif skin erupt NEC

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description

This page was last updated on: 10/1/2019