R21
BillableRash and other nonspecific skin eruption
Rash and other nonspecific skin eruption
Status
Billable / Specific
Block
R20-R23
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 eruption (R23.8)
Excludes 2
Conditions not included here, but the patient may have both
- abnormal findings on antenatal screening of mother (O28.-)
- certain conditions originating in the perinatal period (P04-P96)
- signs and symptoms classified in the body system chapters
- signs and symptoms of breast (N63, N64.5)
- symptoms relating to breast (N64.4-N64.5)
Also Known As / Clinical Terms
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
Frequently Asked Questions
What is ICD-10 code R21?
ICD-10-CM code R21 represents "Rash and other nonspecific skin eruption". It 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.
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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.