Zygomycosis (B46) ICD-10-CM
The B46 code range covers zygomycosis with 9 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the B46 Range 9 codes · 8 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B46 range.
Mucormycosis
Infection in humans and animals caused by any fungus in the order MUCORALES (e.g., RHIZOPUS; MUCOR; CUNNINGHAMELLA; APOPHYSOMYCES; ABSIDIA; SAKSENAEA and RHIZOMUCOR) There are many clinical types associated with infection including central nervous system, lung, gastrointestinal tract, skin, orbit and paranasal sinuses. In humans, it usually occurs as an OPPORTUNISTIC INFECTION.
Zygomycosis
Infection in humans and animals caused by fungi in the class Zygomycetes. It includes MUCORMYCOSIS and entomophthoramycosis. The latter is a tropical infection of subcutaneous tissue or paranasal sinuses caused by fungi in the order Entomophthorales. Phycomycosis, closely related to zygomycosis, describes infection with members of Phycomycetes, an obsolete classification.
About the B46 Code Range
Zygomycosis is a fungal infection that includes mucormycosis and entomophthoramycosis. It belongs to the mycoses, or fungal infections.
B46 separates mucormycosis by where it occurs: the lungs (B46.0), nose and brain (B46.1), digestive tract (B46.2), or skin (B46.3). Other subdivisions identify disseminated mucormycosis (B46.4) and mucormycosis without a specified site (B46.5). The category also has codes for other zygomycoses (B46.8) and unspecified zygomycosis (B46.9).
Questions About This Page
How many billable codes are in the B46 range?
Of the 9 codes in this range, 8 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the B46 range classify?
The range classifies zygomycosis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
