Enteroviral exanthematous fever [Boston exanthem]

This code represents a viral illness characterized by fever and a rash, typically caused by an enterovirus. It is a benign, self-limiting condition often seen in children, presenting with a maculopapular or vesicular rash that can resemble rubella or roseola.

Use this code when documentation specifies a diagnosis of enteroviral exanthematous fever or Boston exanthem. This diagnosis is usually made clinically based on the characteristic fever and rash in the absence of other identifiable causes.

• Ensure the documentation clearly distinguishes this from other viral exanthems, such as measles, rubella, or roseola.
• Do not use this code for hand-foot-and-mouth disease, which is also caused by enteroviruses but has a distinct clinical presentation and separate codes.
• Consider co-reporting with codes for associated symptoms like fever (R50.9) if documented and not inherent to the diagnosis.