Erythema Chronicum Migrans

**Definition:** A deep type of gyrate erythema that follows a bite by an ixodid tick; it is a stage-1 manifestation of LYME DISEASE. The site of the bite is characterized by a red papule that expands peripherally as a nonscaling, palpable band that clears centrally. This condition is often associated with systemic symptoms such as chills, fever, headache, malaise, nausea, vomiting, fatigue, backache, and stiff neck.

**Tree numbers:** - C01.150.252.400.536.400 - C01.150.252.400.794.352.250.400 - C01.150.252.819.310 - C01.800.720.310 - C01.920.930.513.400 - C17.800.229.200 - C17.800.838.765.310

**Synonyms:** - Erythema Migrans of Lyme Disease