Cracking the Code

Coding the Zika Virus

Zika virus, transmitted primarily through mosquito bites, is risky because it can cause a birth defect of the brain called microcephaly. Symptoms of Zika virus are often mild if symptoms appear at all. Some common symptoms include fever, rash, joint pain, and conjunctivitis. Only a confirmed diagnosis of Zika virus, as documented by the provider, is coded. A provider’s statement that the condition is confirmed is sufficient; a positive lab test is not required for coding. Zika virus is reported with A92.5 unless it is stated as probable, suspected, or possible, in which case, the symptoms or exposure to codes are reported.

Interesting fact: Zika is spread mostly by the bite of an infected Aedes species mosquito (Ae. aegypti and Ae. albopictus). These mosquitoes bite during the day and night.

Q: True or False? Zika virus infection during pregnancy can cause a serious birth defect called microcephaly and other severe brain defects.
A: True. Zika is risky because it can cause a birth defect of the brain called microcephaly.
Reference: FY 2023 ICD-10-CM Coding Guidelines, www.cdc.gov
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