A77.41
Ehrlichiosis chaffeensis [E. chaffeensis]
Clinical Classification Guidelines
Medical Intelligence & Overview
Ehrlichiosis chaffeensis, classified under ICD-10 code A77.41, is a bacterial infection transmitted to humans through tick bites. It is caused by the bacterium Ehrlichia chaffeensis, which infects white blood cells and can lead to a range of health issues if not diagnosed and treated promptly. Most cases occur during warmer months when ticks are active, and awareness of the disease can lead to early recognition and management.
Causes & Symptoms
Clinical Causes: Bitten by infected ticks, particularly the lone star tick (Amblyomma americanum) Exposure to tick habitats such as wooded or grassy areas Engaging in outdoor activities where tick exposure is likely Infection occurs when the tick transmits Ehrlichia chaffeensis during a blood meal
Key Symptoms: Fever and chills Headache Muscle aches Fatigue Nausea or vomiting Confusion or mental changes Rash (less common, but may occur in some cases) Joint pain Sweats Loss of appetite
Diagnostic & Treatment
Diagnosis Path: Blood smears to identify infected white blood cells Polymerase chain reaction (PCR) testing for Ehrlichia DNA Serologic tests to detect antibodies (indirect immunofluorescence assay) Complete blood count (CBC) to check for abnormal blood cell counts
Treatment Protocols: Administration of doxycycline for at least 7-14 days Hospitalization in severe cases for IV antibiotics and supportive therapy Rest and hydration Monitoring for complications such as organ failure or severe illness
Clinical Advice & FAQs
Billing Guidance
Is A77.41 a billable ICD-10 code?
Yes, A77.41 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report A77.41?
Clinical documentation must specify the nature of Ehrlichiosis chaffeensis [E. chaffeensis] and any associated comorbidities for accurate reporting.
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