Valid for Submission
R21 is a billable diagnosis code used to specify a medical diagnosis of rash and other nonspecific skin eruption. The code R21 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code R21 might also be used to specify conditions or terms like 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, etc.
According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code R21:
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- rash NOS
Type 1 ExcludesType 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- specified type of rash- code to condition
- vesicular eruption R23.8
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code R21 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- 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
- Centrifugal rash
- Centripetal rash
- Disorder of skin co-occurrent with human immunodeficiency virus infection
- Eruption of female perineum
- Eruption of skin co-occurrent with human immunodeficiency virus infection
- Eruption of skin present
- Eruption of vulva
- Erythematous rash
- Exanthem caused by Chlamydophila psittaci
- Exanthem caused by human echovirus
- Exanthem caused by human echovirus 16
- Generalized rash
- Irritation symptom
- Localized eruption of skin
- Macular eruption
- Maculopapular eruption
- Micropapular wheal
- Morbilliform eruption
- Multimorphic rash
- Non-blanching rash
- Papular eruption
- Papular eruption of blacks
- Papular pruritic eruption of skin due to human immunodeficiency virus infection
- Phototherapy complication
- Phototherapy skin rash
- Premycotic eruption
- Rash due to dribbling from mouth
- Rash due to dribbling of urine
- Rash of genitalia
- Rash of groin
- Rash of periwound skin
- Rash of scalp
- Rash of systemic lupus erythematosus
- Rubelliform eruption
- Skin disorder associated with AIDS
- Skin disorder due to phototherapy
- Skin rash associated with AIDS
- Southern tick-associated rash illness
- Synchronous rash
- Vaccination site rash
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|606||MINOR SKIN DISORDERS WITH MCC||09||1.511|
|607||MINOR SKIN DISORDERS WITHOUT MCC||09||0.8256|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert R21 to ICD-9 Code
Information for Patients
A rash is an area of irritated or swollen skin. Many rashes are itchy, red, painful, and irritated. Some rashes can also lead to blisters or patches of raw skin. Rashes are a symptom of many different medical problems. Other causes include irritating substances and allergies. Certain genes can make people more likely to get rashes.
Contact dermatitis is a common type of rash. It causes redness, itching, and sometimes small bumps. You get the rash where you have touched an irritant, such as a chemical, or something you are allergic to, like poison ivy.
Some rashes develop right away. Others form over several days. Although most rashes clear up fairly quickly, others are long-lasting and need long-term treatment.
Because rashes can be caused by many different things, it's important to figure out what kind you have before you treat it. If it is a bad rash, if it does not go away, or if you have other symptoms, you should see your health care provider. Treatments may include moisturizers, lotions, baths, cortisone creams that relieve swelling, and antihistamines, which relieve itching.
[Learn More in MedlinePlus]