AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2020 Issue 4; New/Revised ICD-10-CM Codes

Powassan (POW) Virus Disease

Subcategory A84.8, Other tick-borne viral encephalitis, was expanded and code A84.81, Powassan virus disease, has been created to specifically identify this disease. Powassan (POW) virus disease is a tick-borne zoonosis caused by the bite of an infected tick, mostly Ixodes scapularis. Although a person who is infected may not develop symptoms immediately due to a long incubation period of one week to one month, POW virus is a serious disease that usually results in encephalitis and/or meningitis and may lead to death. Symptoms can include fever, headache, vomiting, weakness, confusion, loss of coordination, speech difficulties, and...

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