Coding glossary
Rash in MedDRA Coding
"Rash" is a broad lay term that can describe dozens of clinically distinct skin presentations. Good coding depends entirely on how much detail the original verbatim actually gives.
Read for specificity before coding
"Rash," "itchy red rash on arms," and "widespread rash with blistering" are not equivalent verbatims. The last one, in particular, may point toward a more serious skin reaction that a generic "rash" code would understate -- reading the full verbatim (not just the headline symptom) before selecting a term is essential.
Common coding pitfall
Defaulting to a generic rash term because it's the fastest keyword match, without checking whether the verbatim supports a more specific and clinically meaningful term, is the most common error here.
Where this sits in the hierarchy
Rash-type terms live under the Skin and subcutaneous tissue disorders System Organ Class. The specific Lowest Level Term, Preferred Term, and full hierarchy are licensed MedDRA content -- an active subscription is required for full hierarchy access. MedDRA Learner's public tier trains the underlying skill (matching a verbatim to the right level of specificity) at the LLT level, no subscription required.
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