ICD-10-CM > A00-B99 > A75-A79 > A77 > A77.4 A77.4 Ehrlichiosis Non-Billable/Non-Specific Type 1 Excludes anaplasmosis [A. phagocytophilum] (A79.82)rickettsiosis due to Ehrlichia sennetsu (A79.81) Codes A77.40Ehrlichiosis, unspecifiedA77.41Ehrlichiosis chaffeensis [E. chaffeensis]A77.49Other ehrlichiosis