ICD-10 Code for Mucormycosis
The ICD-10-CM code for mucormycosis is B46.5 — Mucormycosis, unspecified. This is the code the Alphabetic Index gives for mucormycosis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
B46.5 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which mucormycosis code should you use?
The Alphabetic Index lists 6 codes under Mucormycosis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| cutaneous | B46.3 | Cutaneous mucormycosis | |
| disseminated | B46.4 | Disseminated mucormycosis | |
| gastrointestinal | B46.2 | Gastrointestinal mucormycosis | |
| generalized | B46.4 | Disseminated mucormycosis | |
| pulmonary | B46.0 | Pulmonary mucormycosis | |
| rhinocerebral | B46.1 | Rhinocerebral mucormycosis | |
| skin | B46.3 | Cutaneous mucormycosis | |
| subcutaneous | B46.3 | Cutaneous mucormycosis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources