O'nyong-nyong fever

O'nyong-nyong fever is an acute arboviral infection caused by the O'nyong-nyong virus, transmitted by Anopheles mosquitoes. It presents with symptoms similar to other alphavirus infections, including fever, polyarthralgia, rash, and lymphadenopathy, particularly affecting the cervical and postauricular nodes. The illness is typically self-limiting but can cause significant discomfort.

This code is used when a patient is diagnosed with an infection specifically identified as O'nyong-nyong fever. Documentation should clearly state the diagnosis, often supported by laboratory confirmation (e.g., PCR, serology) or strong epidemiological links in endemic areas. It is appropriate for both initial and subsequent encounters related to this specific viral illness.

• Ensure the documentation explicitly names "O'nyong-nyong fever" to support this specific code.
• Do not confuse with other arboviral fevers (e.g., Chikungunya, Dengue) unless O'nyong-nyong is specifically identified.
• Code any associated symptoms (e.g., rash, arthralgia) separately if they are significant and not integral to the fever diagnosis itself.