ICD-10 Code B46.8 – Other zygomycoses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B46.8 – Other zygomycoses
What it is
B46.8 identifies zygomycosis caused by fungi in the Mucorales group when the infection does not fit a more specific ICD-10 subtype. Use it for documented “other” mucormycosis or zygomycosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include rapidly progressive invasive fungal infection, tissue necrosis, and involvement of the sinuses, lungs, skin, or other organs.
When to use this code
Use B46.8 when the provider documents zygomycosis or mucormycosis and the record does not specify a different coded form. It also applies when the infection is identified as an “other” zygomycosis subtype. If the note names a more specific manifestation or site, code that documentation instead.
Do not use for
Do not use this code for other fungal infections, such as candidiasis or aspergillosis. If documentation specifies a different mucormycosis category or location, check documentation and code the more specific diagnosis.
Coding tip
Look for the exact organism name and infection site in the chart before assigning B46.8.