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Compare/B46 vs C84.0

B46 vs C84.0

B46 (Zygomycosis) compared with C84.0 (Mycosis fungoides), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. B46 carries an Excludes2 note covering C84.0: “mycosis fungoides (C84.0-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

B46ZygomycosisC84.0Mycosis fungoides
Billing statusNon-billable header

Report instead: B46.0, B46.1, B46.2, B46.3, B46.4

Non-billable header

Report instead: C84.00, C84.01, C84.02, C84.03, C84.04

ClassificationA00-B99 — Certain Infectious and Parasitic Diseases (A00-B99)C00-D49 — Neoplasms (C00-D49)
DefinitionZygomycosis is a non-billable ICD-10-CM category code (B46).Mycosis fungoides is a non-billable ICD-10-CM category code (C84.0).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources