ICD-10 Code B48.2 – Allescheriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B48.2 – Allescheriasis
What it is
Allescheriasis is a rare fungal infection caused by Allescheria species. Use this code when the diagnosis is confirmed or clearly documented in the medical record.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include localized infection signs and evidence of fungal involvement, but presentation depends on the site and severity.
When to use this code
Use B48.2 when the provider documents Allescheriasis as the final diagnosis. It may also apply when the record clearly identifies an infection due to Allescheria species and no more specific code is available.
If the note only says “fungal infection” or does not identify the organism, check documentation before coding B48.2. Confirm that the diagnosis is not being ruled out or used only as a history item.
Do not use for
Do not use this code for unspecified mycoses, colonization without infection, or other fungal diseases caused by different organisms. Check documentation if the organism is not clearly stated.
Coding tip
Code B48.2 only when Allescheria is explicitly named in the provider’s diagnosis or assessment.