R20-R23: Symptoms and signs involving the skin and subcutaneous tissue
R21: Rash and other nonspecific skin eruption
The appearance of a rash can vary greatly. Often the skin is reddened. Sometimes the skin becomes discolored or sores form on the skin.
There are many different reasons for a rash. You may not be able to tolerate certain foods or medicines, for example. Various illnesses can also cause a rash. These include inflammation from pathogens, for example.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.