B74.8
Other filariases
Clinical Classification Guidelines
Inclusion Terms
- Dirofilariasis
Medical Intelligence & Overview
Other filariases, classified under ICD-10 code B74.8, refer to a group of parasitic infections caused by filarial worms that are not categorized under the more common types of filariasis. These infections primarily result from mosquito, fly, or other insect vectors transmitting the worms to humans. Dirofilariasis, a notable example, is caused by the parasitic worm Dirofilaria, which is typically transmitted through mosquito bites. Though less common than other filarial infections like lymphatic filariasis, these rare infections can affect various tissues and organs, leading to diverse health issues.
Causes & Symptoms
Clinical Causes: Infected mosquito bites transmitting Dirofilaria or other filarial worms Intermittent exposure in regions where filariasis is endemic Contact with infected animals, such as dogs (especially in dirofilariasis) Ingesting contaminated water or food in rare cases
Key Symptoms: Subcutaneous nodules or lumps under the skin Swelling or inflammation around infected tissues Localized pain or tenderness In cases of pulmonary involvement, cough or chest discomfort Potential allergic reactions, including itching or rashes Rarely, systemic symptoms like fever or fatigue
Diagnostic & Treatment
Diagnosis Path: Diagnosis of other filariases involves a combination of clinical evaluation and laboratory testing. Routine blood tests may reveal eosinophilia (increased eosinophils), which suggests a parasitic infection. Imaging techniques such as ultrasound, X-ray, or MRI can help identify cysts or nodules. Definitive diagnosis often requires detecting microfilariae in blood samples using blood smear microscopy or serological tests that identify specific antibodies or antigens associated with filarial worms. Biopsies of nodules or cysts may also provide tissue evidence of infection.
Treatment Protocols: Treatment strategies depend on the extent and location of the infection. Common approaches include antiparasitic medications such as diethylcarbamazine (DEC), ivermectin, or albendazole to kill the worms. Surgical removal of cysts or nodules may be necessary in cases where the worms cause significant tissue damage or persistent symptoms. Managing allergic reactions and inflammation is also important. Preventative measures involve controlling mosquito populations and using protective clothing or repellents, especially in endemic areas.
Clinical Advice & FAQs
Billing Guidance
Is B74.8 a billable ICD-10 code?
Yes, B74.8 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report B74.8?
Clinical documentation must specify the nature of Other filariases and any associated comorbidities for accurate reporting.
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