ICD-10 Code B46.2 – Gastrointestinal mucormycosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B46.2 – Gastrointestinal mucormycosis
What it is
B46.2 identifies mucormycosis involving the gastrointestinal tract. Use it when documentation specifies fungal invasion of the stomach, intestines, or related GI structures.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include abdominal pain, gastrointestinal bleeding, fever, vomiting, or signs of tissue necrosis in invasive disease.
When to use this code
Use this code when the provider documents gastrointestinal mucormycosis, including confirmed or clinically diagnosed infection affecting the GI tract. It is appropriate when the site is clearly identified as gastrointestinal rather than nasal, pulmonary, or disseminated. Check documentation if the anatomic site is unclear.
Do not use for
Do not use B46.2 for mucormycosis limited to other body sites, such as pulmonary or rhinocerebral disease. Do not assign it when the record only says “fungal infection” without specifying mucormycosis.
Coding tip
Verify that the provider names the gastrointestinal site and the organism as mucormycosis before assigning B46.2.