Short answer · Medically reviewed summary · Last updated: 2026-05-08
Ross River virus (RRV) is classified under the ICD-10 code B33.1, while in the older ICD-9 system, it was categorized under 066.3 (Other mosquito-borne viral diseases). These diagnostic codes are essential for healthcare providers to document the infection, which is a mosquito-borne alphavirus primarily found in Australia and the Pacific Islands. What is the clinical classification of Ross River virus? The Ross River virus is the causative agent of Ross River fever, a debilitating condition characterized by polyarthritis and myalgia.
ICD10 code of Ross River Virus and ICD9 code
ICD-10 and ICD-9 codes for Ross River Virus, with classification details for clinicians, coders and patients.
Ross River virus (RRV) is classified under the ICD-10 code B33.1, while in the older ICD-9 system, it was categorized under 066.3 (Other mosquito-borne viral diseases). These diagnostic codes are essential for healthcare providers to document the infection, which is a mosquito-borne alphavirus primarily found in Australia and the Pacific Islands.
What is the clinical classification of Ross River virus?
The Ross River virus is the causative agent of Ross River fever, a debilitating condition characterized by polyarthritis and myalgia. Clinicians use the ICD-10 code B33.1 to specifically track cases of Ross River virus infection. Because the virus is an arbovirus, accurate coding helps public health authorities monitor outbreaks and understand the long-term impact on patients who may experience persistent joint pain for months or even years.
How is a Ross River virus infection diagnosed?
Diagnosis of Ross River virus is typically confirmed through serological testing. Because symptoms can mimic other inflammatory conditions, physicians look for specific patterns of joint involvement. The following diagnostic criteria and findings are commonly associated with the disease:
- Detection of RRV-specific IgM antibodies in serum.
- A four-fold or greater rise in IgG antibody titers between acute and convalescent phases.
- Clinical presentation of symmetrical polyarthritis, often affecting the wrists, knees, and ankles.
- A distinct rash, which occurs in approximately 30-50% of Ross River virus patients.
What is the typical prognosis for Ross River virus?
While most people recover from Ross River virus within a few weeks, a subset of patients experiences chronic fatigue and joint pain that lasts for six months or longer. Currently, there is no specific antiviral treatment for Ross River virus, so management focuses on supportive care, including non-steroidal anti-inflammatory drugs (NSAIDs) to manage the acute arthritic symptoms.
Next steps
- Consult with an infectious disease specialist or a rheumatologist if joint pain persists beyond the acute infection phase.
- Connect with others who understand the long-term impacts of Ross River virus by joining the community at DiseaseMaps.org.
- Maintain a symptom diary to track the frequency and severity of your joint pain for your next medical appointment.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.
References
- World Health Organization (WHO) - ICD-10 Browser (B33.1)
- Australian Government Department of Health and Aged Care - Ross River Virus Fact Sheet
- Centers for Disease Control and Prevention (CDC) - Arboviral Diseases Information
- NIH Genetic and Rare Diseases Information Center (GARD)
