Subcategory A79.8 Other specified rickettsioses, was expanded and code A79.82, Anaplasmosis [A. phagocytophilum], has been created to specifically identify this disease.
Anaplasmosis is a tick-borne disease caused by the bite of an infected tick, mostly the blacklegged tick or deer tick (lxodes scapularis) and the western blacklegged tick (lxodes pacificus). It is important to note Ixodes ticks are commonly coinfected with other organisms and can transmit Lyme disease, Babesia, Ehrlichia, Rickettsia, and Powassan virus. In rare cases, anaplasmosis can spread by blood transfusions. Early signs and symptoms usually occur one to five days after an infected tick bite. Symptoms are often mild or moderate in nature and may include fever, chills, malaise, muscle aches and headaches. Unlike Lyme disease, anaplasmosis does not commonly cause a rash. Signs and symptoms of severe or late stage illness can include respiratory failure, bleeding problems, organ failure, and death. Risk factor of severe illness can be due to delayed treatment, age (older patients), and a weakened immune system. Prompt treatment can reduce the risk of developing severe anaplasmosis illness.
The creation of this code will improve coding accuracy, as well as increase provider and, consequently, population, awareness of this disease. In addition, the new code will allow the ability to monitor the spread of the disease nationally, and therefore assist in the development of appropriate prevention strategies to reduce the spread of the disease to ensure public safety.
A 63-year-old patient presented to the hospital with abrupt onset of fevers, chills, and muscle weakness. Diagnostic blood work came back positive for Lyme disease co-infected with Ehrlichia, and Anaplasmosis. The patient reported a tick bite while hiking through the woods about one week ago. The provider diagnosed Ehrlichia, Lyme disease and Anaplasmosis; treated the patient with an antibiotic; and discharged the patient home. What are the appropriate ICD-10-CM code assignments for this admission?