ICD-10 Code B43.1 – Pheomycotic Brain Abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B43.1 – Pheomycotic brain abscess
What it is
B43.1 identifies a brain abscess caused by a pheomycotic fungal infection. Use it when documentation specifies this fungal etiology and the infection is located in the brain.
Clinical signs
Clinical features vary; refer to documentation. Typical abscess findings may include focal neurologic deficits, headache, fever, or signs of raised intracranial pressure, but the recorded diagnosis should confirm the pheomycotic cause.
When to use this code
Use this code when the provider documents a pheomycotic abscess of the brain, or clearly links a fungal brain abscess to this specific infection. It is appropriate for confirmed intracranial brain involvement, not for general fungal infection without abscess. Check documentation if the site or organism is unclear.
Do not use for
Do not use it for non-brain fungal infections, other intracranial infections, or abscesses with no documented pheomycotic cause. If the record only says “brain abscess” without organism detail, check documentation.
Coding tip
Code B43.1 only when both the brain location and pheomycotic etiology are documented together.