Other ehrlichiosis

This code represents ehrlichiosis caused by species other than Ehrlichia chaffeensis (which causes monocytic ehrlichiosis) or Ehrlichia ewingii (which causes ewingii ehrlichiosis). These are tick-borne bacterial infections that can present with fever, headache, malaise, and myalgia, often accompanied by leukopenia, thrombocytopenia, and elevated liver enzymes.

Use this code when documentation specifies ehrlichiosis due to an identified Ehrlichia species other than E. chaffeensis or E. ewingii, or when the specific species is not identified but monocytic or ewingii ehrlichiosis has been ruled out. This code is appropriate when laboratory confirmation of an Ehrlichia infection is present, but the specific type of ehrlichiosis is not precisely categorized as monocytic or ewingii.

• Ensure documentation clearly distinguishes from monocytic ehrlichiosis (A77.41) and ewingii ehrlichiosis (A77.42).
• If the specific Ehrlichia species is unknown, but ehrlichiosis is confirmed, this code is generally appropriate unless further specificity can be obtained.
• Do not use this code for anaplasmosis, which is a related but distinct tick-borne illness.