B33.4
Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
Clinical Classification Guidelines
Use Additional Code
- code to identify any associated acute kidney failure (N17.9)
Inclusion Terms
- Hantavirus disease with pulmonary manifestations
- Sin nombre virus disease
Excludes Type 1
- hantavirus disease with renal manifestations (A98.5)
- hemorrhagic fever with renal manifestations (A98.5)
Medical Intelligence & Overview
Hantavirus Pulmonary Syndrome (HPS), classified under ICD-10 code B33.4, is a rare but serious respiratory disease caused by infection with hantaviruses. Also known as Sin Nombre virus disease, HPS primarily affects the lungs and can lead to severe respiratory distress. The syndrome begins with flu-like symptoms and can rapidly progress to severe pulmonary complications that require urgent medical attention.
Causes & Symptoms
Clinical Causes: Exposure to infected rodent urine, droppings, or saliva, especially from deer mice Inhalation of airborne particles contaminated with hantavirus Proximity to areas with high rodent populations, such as rural or wooded environments Occupational exposure during activities like farming, cleaning rodent-infested areas, or construction work
Key Symptoms: Fever and chills Muscle aches, especially in the large muscle groups Fatigue and weakness Headache Nausea, vomiting, or diarrhea Shortness of breath and difficulty breathing as pulmonary symptoms develop Cough that may be dry or productive Chest tightness or pain Rapid breathing and respiratory distress in severe cases
Diagnostic & Treatment
Diagnosis Path: Clinical evaluation based on symptoms and exposure history Laboratory tests to detect hantavirus-specific antibodies (IgM and IgG) Polymerase Chain Reaction (PCR) testing to identify viral RNA Chest imaging, such as X-rays, to assess lung involvement Monitoring of blood oxygen levels and respiratory function
Treatment Protocols: Supportive care in a hospital setting, including oxygen therapy to help with breathing Mechanical ventilation in severe cases where respiratory failure occurs Monitoring and management of fluid balance to prevent pulmonary edema Use of medications to manage symptoms, such as fever reducers and pain relievers Close medical supervision to address complications promptly
Clinical Advice & FAQs
Billing Guidance
Is B33.4 a billable ICD-10 code?
Yes, B33.4 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report B33.4?
Clinical documentation must specify the nature of Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS] and any associated comorbidities for accurate reporting.
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