Vaccinia not from vaccine

This code represents a localized skin infection caused by the vaccinia virus, but specifically when the infection is acquired through means other than a smallpox vaccination. It typically presents as a papule that progresses to a vesicle, pustule, and then an ulcer with surrounding erythema, often accompanied by regional lymphadenopathy.

Use this code when documentation clearly indicates a vaccinia virus infection that is not a direct result of a smallpox vaccination. This might include accidental exposure to the virus in a laboratory setting or contact with an animal infected with vaccinia. Documentation should specify the etiology as vaccinia and explicitly rule out vaccination as the source.

• Do not use this code for vaccinia infections directly resulting from smallpox vaccination; refer to T88.1 for those cases.
• Ensure the medical record clearly distinguishes between vaccinia from vaccination and vaccinia acquired through other means.
• Consider any associated symptoms or complications for additional coding, such as secondary bacterial infections.