ICD-10 Code B74.8 – Other filariases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B74.8 – Other filariases
What it is
B74.8 identifies filarial infections that do not fit a more specific filariasis code. Use it when documentation confirms a filarial disease, but the species or form is not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Filariasis may present with lymphatic swelling, skin changes, or other organ involvement depending on the parasite and site of infection.
When to use this code
Use B74.8 when the clinician documents “other filariasis,” an unspecified filarial infection, or a filarial condition not captured by a more specific code. It is appropriate when the record supports filariasis, but does not name a better-defined category. Check documentation if the parasite type is unclear.
Do not use for
Do not use this code for filariasis with a more specific ICD-10-CM option, or when documentation only suggests exposure without confirmed disease. Avoid it if the chart identifies a different parasitic infection.
Coding tip
Confirm the provider documented filariasis, then code the most specific available option before defaulting to B74.8.