2024 ICD-10-CM Diagnosis Code R21
Rash and other nonspecific skin eruption
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
- R21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM R21 became effective on October 1, 2023.
- This is the American ICD-10-CM version of R21 - other international versions of ICD-10 R21 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as R21. A type 1 excludes note is for used for 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 (ICD-10-CM Diagnosis Code R23.8R23.8)
Other skin changes
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
- rash NOS
The following code(s) above R21 contain annotation back-references
Approximate Synonyms
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
that may be applicable to R21:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
- R00-R99 2024 ICD-10-CM Range R00-R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Note- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
- R20-R23 2024 ICD-10-CM Range R20-R23Symptoms and signs involving the skin and subcutaneous tissue
- Eruption
- Eruption of vulva
- Rash
- Vulvar rash
- A rash is an area of irritated or swollen skin. It might be red and itchy, bumpy, scaly, crusty or blistered. Rashes are a symptom of many different medical conditions. Things that can cause a rash include other diseases, irritating substances, allergies and your genetic makeup.contact dermatitis is a common cause of rashes. It causes redness, itching and burning where you have touched an irritant, such as a chemical, or something you are allergic to, like poison ivy. Some rashes develop immediately. Others form over several days. If you scratch your rash, it might take longer to heal. The treatment for a rash usually depends on its cause. Options include moisturizers, lotions, baths, cortisone creams that relieve swelling, and antihistamines, which relieve itching.
- Any change in the skin which affects its appearance or texture. A rash may be localized to one part of the body, or affect all the skin. Rashes may cause the skin to change color, itch, become warm, bumpy, dry, cracked or blistered, swell and may be painful.
- Diseases in which skin eruptions or rashes are a prominent manifestation. Classically, six such diseases were described with similar rashes; they were numbered in the order in which they were reported. Only the fourth (duke's disease), fifth (erythema infectiosum), and sixth (exanthema subitum) numeric designations survive as occasional synonyms in current terminology.
Convert R21 to ICD-9-CM
Code History- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
Diagnosis Index entries containing back-references to R21:
ICD-10-CM Codes Adjacent To R21
R19.6 Halitosis
R19.7 Diarrhea, unspecified
R19.8 Other specified symptoms and signs involving the digestive system and abdomen
R20 Disturbances of skin sensation
R20.0 Anesthesia of skin
R20.1 Hypoesthesia of skin
R20.2 Paresthesia of skin
R20.3 Hyperesthesia
R20.8 Other disturbances of skin sensation
R20.9 Unspecified disturbances of skin sensation
R21
Rash and other nonspecific skin eruption
R22 Localized swelling, mass and lump of skin and subcutaneous tissue
R22.0 Localized swelling, mass and lump, head
R22.1 Localized swelling, mass and lump, neck
R22.2 Localized swelling, mass and lump, trunk
R22.3 Localized swelling, mass and lump, upper limb
R22.30 Localized swelling, mass and lump, unspecified upper limb
R22.31 Localized swelling, mass and lump, right upper limb
R22.32 Localized swelling, mass and lump, left upper limb
R22.33 …… bilateral
R22.4 Localized swelling, mass and lump, lower limb
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.