Erythema infectiosum [fifth disease]

This code identifies Erythema Infectiosum, commonly known as Fifth Disease, a mild viral illness caused by parvovirus B19. It typically presents with a characteristic "slapped cheek" rash on the face, followed by a lacy, reticulated rash on the trunk and extremities. While often benign, it can have implications for pregnant individuals or those with compromised immune systems.

Assign this code for confirmed or suspected cases of Fifth Disease based on clinical presentation. Documentation should clearly indicate the presence of the characteristic rash, often with accompanying mild constitutional symptoms like low-grade fever or malaise. This code is appropriate for both acute and resolving phases of the infection.

• Do not confuse with other viral exanthems; differentiate based on the specific rash morphology.
• If a pregnant patient is diagnosed with Fifth Disease, also code for the maternal condition (e.g., O98.5-).
• Ensure documentation specifies "Erythema Infectiosum" or "Fifth Disease" for accurate code assignment.