R21
BillableRash and other nonspecific skin eruption
Rash and other nonspecific skin eruption
Coding Notes
Includes
Conditions included under this code
- rash NOS
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- specified type of rash- code to condition
- •vesicular eruptionR23.8
Excludes 2
Conditions not included here, but the patient may have both
- •abnormal findings on antenatal screening of motherO28
- •certain conditions originating in the perinatal periodP04-P96
- signs and symptoms classified in the body system chapters
- •signs and symptoms of breast,N63, N64.5
- •symptoms relating to breastN64.4-N64.5
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(353)
SNOMED CT
- Blanching of skin4470009
- Acquired pancytopenia5876000
- Pancytopenia - acquired5876000
- Butterfly rash30704002
- Malar rash30704002
- Chlamydia psittaci infection75116005
- Ornithosis75116005
- Parrot fever75116005
- Parrot fever due to Chlamydia psitacci75116005
- Psittacosis75116005
- Neonatal purpura82835005
- Neonatal thrombocytopenia82835005
- Purpura of newborn82835005
- Butterfly rash associated with systemic lupus95332009
- Rash of systemic lupus erythematosus95332009
- Application site reaction95365001
- Administration site rash95371007
- Application site rash95371007
- Neonatal anaemia234350007
- Neonatal anemia234350007
- Haemophagocytic lymphohistiocytosis234437005
- Haemophagocytic syndrome234437005
- Hemophagocytic lymphohistiocytosis234437005
- Hemophagocytic syndrome234437005
- Hyperinflammatory lymphohistiocytosis234437005
- Biers spots238811006
- Papular eruption of blacks239100009
- Broken skin247442005
- Defect in skin surface247442005
- Skin breakdown247442005
- Blisters beneath skin247465000
- Morbilliform eruption247470007
- Morbilliform rash247470007
- Maculopapular eruption247471006
- Maculopapular exanthema247471006
- Maculopapular rash247471006
- Hives247472004
- Nettle rash247472004
- Urticarial rash247472004
- Weal247472004
- Welt247472004
- Wheal247472004
- Macular eruption271756005
- Macular rash271756005
- Papular eruption271757001
- Bullous eruption271759003
- Breaking out - eruption271807003
- Eruption271807003
- Eruption of skin271807003
- Exanthem271807003
- Rash271807003
- Skin eruption271807003
- Skin rash271807003
- Phototherapy skin rash276719000
- Eruption of vulva289482006
- Rash of vulva289482006
- Vulval rash289482006
- Eruption of female perineum289857000
- Female perineal rash289857000
- Rash of female perineum289857000
- Rubelliform eruption297958004
- Rubelliform rash297958004
- Micropapular weal298138003
- Micropapular wheal298138003
- Multimorphic rash301447009
- POTS - postural orthostatic tachycardia syndrome371073003
- PoTS - postural tachycardia syndrome371073003
- Postural orthostatic tachycardia syndrome371073003
- Postural tachycardia syndrome371073003
- Centripetal rash398591002
- Centrifugal rash398600002
- Blanching rash400990009
- Non-blanching rash400991008
- Premycotic eruption404102002
- Premycotic rash404102002
- Synchronous rash409642009
- Disorder of haematopoietic system in newborn414028007
- Disorder of hematopoietic system in newborn414028007
- Skin rash with AIDS (acquired immunodeficiency syndrome)420281004
- Skin rash with acquired immunodeficiency syndrome420281004
- Skin disorder with AIDS (acquired immunodeficiency syndrome)421394009
- Skin disorder with acquired immunodeficiency syndrome421394009
- Rash of genitalia442279002
- Masters disease444100007
- STARI - Southern tick-associated rash illness444100007
- Southern tick-associated rash illness444100007
- Eruption of skin co-occurrent with human immunodeficiency virus infection713316008
- Skin rash co-occurrent with human immunodeficiency virus infection713316008
- Disorder of skin co-occurrent with human immunodeficiency virus infection713340000
- Acute blistering eruption of skin721542002
- Acute blistering skin eruption721542002
- Acute desquamating eruption of skin721543007
- Acute desquamating skin eruption721543007
- Acute eruption of skin723010005
- Acute skin eruption723010005
- Acute maculopapular eruption of skin723012002
- Acute maculopapular skin eruption723012002
- Acute papular eruption of skin723013007
- Acute papular skin eruption723013007
- Acute exudative skin eruption723014001
- Acute annular eruption of skin723015000
- Acute discoid eruption of skin723015000
- Acute erythematous eruption of skin723166008
- Acute erythematous skin eruption723166008
- Localised eruption of skin724877007
- Localised rash724877007
- Localized eruption of skin724877007
- Localized rash724877007
- Diffuse rash725119006
- Generalised rash725119006
- Generalized rash725119006
- Exanthem caused by Chlamydophila psittaci735958007
- Eruption of scalp827044000
- Rash of scalp827044000
- Rash due to dribbling from mouth827051009
- Rash due to dribbling of urine827052002
- Erythematous rash827160004
- Eruption of skin present846742005
- Rash present846742005
- Vaccination site rash863909002
- Human immunodeficiency virus infection associated papular pruritic eruption870328002
- Papular pruritic eruption of skin due to human immunodeficiency virus infection870328002
- Orthostatic intolerance870368003
- Boston exanthem870728004
- Exanthem caused by human echovirus 16870728004
- Echovirus exanthem870729007
- Exanthem caused by human echovirus870729007
- Disorder of skin due to human immunodeficiency virus infection1148863007
- Skin disease due to human immunodeficiency virus infection1148863007
- Bacteraemic skin rash1176998005
- Bacteremic skin rash1176998005
- Rash of skin due to bacteraemia1176998005
- Rash of skin due to bacteremia1176998005
- Acute pustular eruption of skin1251376007
- Acute pustular skin eruption1251376007
- Acute pustular skin rash1251376007
- Eruption of skin of face1264021005
- Face rash1264021005
- Facial rash1264021005
- Eruption of skin of penis1264043002
- Penile skin rash1264043002
- Rash of skin of penis1264043002
- Eruption of skin caused by Salmonella1287188004
- Salmonella exanthem1287188004
- Eruption of skin caused by Salmonella Paratyphi1287471003
- Paratyphoid exanthem1287471003
- Eruption of skin caused by Salmonella Paratyphi A1287511006
- Paratyphoid A exanthem1287511006
- Eruption of skin caused by Salmonella Paratyphi B1287512004
- Paratyphoid B exanthem1287512004
- Eruption of skin caused by Salmonella Paratyphi C1287513009
- Paratyphoid C exanthem1287513009
- BASCULE (bier anaemic spots, cyanosis, urticaria-like eruption) syndrome1290892007
- BASCULE (bier anemic spots, cyanosis, urticaria-like eruption) syndrome1290892007
- Bier anaemic spots, cyanosis, and urticaria-like eruption syndrome1290892007
- Bier anemic spots, cyanosis, and urticaria-like eruption syndrome1290892007
- NOCARH syndrome1360083000
- Neonatal onset cytopenia, autoinflammation, rash, episodes of hemophagocytic lymphohistiocytosis syndrome1360083000
- Rash of groin14660001000004108
- Rash of periwound skin391000161103
UMLS
- Cutaneous EruptionC5779628
- EfflorescenceC5779628
- RashC5779628
- Rash (nonspecific)C5779628
- Rash NOSC5779628
- Rash and other nonspecific skin eruptionC5779628
- RashesC5779628
- Skin RashC5779628
- Skin rashC5779628
- Skin rashesC5779628
- cutaneous eruption on skinC5779628
- cutaneous eruptionsC5779628
- exanthemC5779628
- exanthemaC5779628
- exanthemasC5779628
- exanthemataC5779628
- exanthemsC5779628
- rashC5779628
- rash NOSC5779628
- skin eruptionC5779628
- skin rashC5779628
Clinical Terms
- Premycotic rash
- Acute discoid eruption of skin
- Skin disorder with AIDS (acquired immunodeficiency syndrome)
- Eruption of skin
- Eruption of skin caused by Salmonella Paratyphi C
- Acute pustular eruption of skin
- Neonatal anemia
- Skin disease due to human immunodeficiency virus infection
- exanthems
- Eruption of skin caused by Salmonella
- Hemophagocytic lymphohistiocytosis
- Generalised rash
- Butterfly rash
- Acute maculopapular skin eruption
- Skin rash
- Broken skin
- Centrifugal rash
- Micropapular wheal
- Bacteremic skin rash
- Postural tachycardia syndrome
- Localised eruption of skin
- Acute eruption of skin
- Parrot fever
- Breaking out - eruption
- Exanthem
- Salmonella exanthem
- Psittacosis
- cutaneous eruptions
- Orthostatic intolerance
- Welt
- Disorder of haematopoietic system in newborn
- exanthema
- Rash due to dribbling from mouth
- STARI - Southern tick-associated rash illness
- Centripetal rash
- Acute skin eruption
- Rash of skin of penis
- Exanthem caused by Chlamydophila psittaci
- Acute blistering eruption of skin
- Micropapular weal
- Localised rash
- Phototherapy skin rash
- Rash of skin due to bacteremia
- Skin rash with AIDS (acquired immunodeficiency syndrome)
- NOCARH syndrome
- Eruption of female perineum
- Skin rash with acquired immunodeficiency syndrome
- Skin rashes
- Exanthem caused by human echovirus 16
- Eruption of skin caused by Salmonella Paratyphi A
- Rash of systemic lupus erythematosus
- Skin rash co-occurrent with human immunodeficiency virus infection
- Hyperinflammatory lymphohistiocytosis
- Postural orthostatic tachycardia syndrome
- Blanching rash
- Butterfly rash associated with systemic lupus
- exanthemata
- Eruption of skin caused by Salmonella Paratyphi
- Southern tick-associated rash illness
- Acute exudative skin eruption
- Papular eruption of blacks
- Haemophagocytic lymphohistiocytosis
- Macular rash
- Bacteraemic skin rash
- Rash of scalp
- Application site rash
- Macular eruption
- Disorder of skin co-occurrent with human immunodeficiency virus infection
- Rubelliform rash
- Acute papular eruption of skin
- Disorder of hematopoietic system in newborn
- Neonatal purpura
- Ornithosis
- Eruption of skin co-occurrent with human immunodeficiency virus infection
- Neonatal anaemia
- Rash of groin
- Administration site rash
- Acute desquamating skin eruption
- Application site reaction
- Rash
- Hives
- Chlamydia psittaci infection
- Morbilliform eruption
- Rash of genitalia
- Eruption of scalp
- Biers spots
- Neonatal onset cytopenia, autoinflammation, rash, episodes of hemophagocytic lymphohistiocytosis syndrome
- rash NOS
- Skin eruption
- Acute pustular skin rash
- Paratyphoid A exanthem
- Acute maculopapular eruption of skin
- Eruption of skin of penis
- Paratyphoid C exanthem
- Maculopapular rash
- Vaccination site rash
- BASCULE (bier anaemic spots, cyanosis, urticaria-like eruption) syndrome
- Rash of vulva
- Eruption
- PoTS - postural tachycardia syndrome
- Blisters beneath skin
- Vulval rash
- Malar rash
- Synchronous rash
- BASCULE (bier anemic spots, cyanosis, urticaria-like eruption) syndrome
- Multimorphic rash
- Blanching of skin
- Acute erythematous skin eruption
- Rash of skin due to bacteraemia
- Eruption of skin present
- Bier anaemic spots, cyanosis, and urticaria-like eruption syndrome
- Wheal
- Acquired pancytopenia
- Human immunodeficiency virus infection associated papular pruritic eruption
- Bier anemic spots, cyanosis, and urticaria-like eruption syndrome
- Eruption of skin caused by Salmonella Paratyphi B
- Female perineal rash
- Papular pruritic eruption of skin due to human immunodeficiency virus infection
- Skin disorder with acquired immunodeficiency syndrome
- Non-blanching rash
- Acute papular skin eruption
- Boston exanthem
- Rashes
- Acute annular eruption of skin
- Nettle rash
- Acute desquamating eruption of skin
- Rash present
- Haemophagocytic syndrome
- Maculopapular exanthema
- Efflorescence
- Localized rash
- Eruption of skin of face
- Echovirus exanthem
- Maculopapular eruption
- Bullous eruption
- Acute pustular skin eruption
- Urticarial rash
- Exanthem caused by human echovirus
- Rubelliform eruption
- Eruption of vulva
- Rash due to dribbling of urine
- Parrot fever due to Chlamydia psitacci
- POTS - postural orthostatic tachycardia syndrome
- Weal
- Acute erythematous eruption of skin
- Masters disease
- Face rash
- Rash of periwound skin
- Premycotic eruption
- Neonatal thrombocytopenia
- exanthemas
- Hemophagocytic syndrome
- Skin breakdown
- Defect in skin surface
- Disorder of skin due to human immunodeficiency virus infection
- Papular eruption
- Rash of female perineum
- Pancytopenia - acquired
- Erythematous rash
- Morbilliform rash
- Facial rash
- Generalized rash
- Paratyphoid B exanthem
- Paratyphoid exanthem
- Rash (nonspecific)
- Cutaneous Eruption
- Purpura of newborn
- Acute blistering skin eruption
- Penile skin rash
- Localized eruption of skin
- Diffuse rash
- cutaneous eruption on skin
Frequently Asked Questions
What is the ICD-10 code for rash and other nonspecific skin eruption?
The ICD-10-CM code for rash and other nonspecific skin eruption is R21. The full clinical description is "Rash and other nonspecific skin eruption". R21 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code R21 mean?
ICD-10-CM code R21 represents “Rash and other nonspecific skin eruption”. It is classified under Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings and is a billable/specific code that can be used on a claim.
Is R21 a billable code?
Yes, R21 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is R21 in?
R21 is in Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (codes R00-R99).
What codes cannot be used with R21?
R21 has Excludes1 notes indicating codes that cannot be used together with it, including: specified type of rash- code to condition; vesicular eruption (R23.8).
What SNOMED CT codes does R21 map to?
R21 maps to 76 SNOMED CT concepts: 5876000, 723015000, 721542002, 721543007, 723010005, and 71 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for R21?
R21 is linked to 1 UMLS Concept Unique Identifier: C5779628. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does R21 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like rash and other nonspecific skin eruption affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of R21?
R21 maps to the ICD-11 code: ME62.Y (Other specified acute skin eruption of uncertain or unspecified nature).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.