2024 ICD-10-CM Diagnosis Code B46

Zygomycosis

  • B46 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2024 edition of ICD-10-CM B46 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B46 – other international versions of ICD-10 B46 may differ.

The following code(s) above B46 contain annotation back-references

 that may be applicable to B46:

  • A00-B99  Certain infectious and parasitic diseases
  • B35-B49  Mycoses

Clinical Information

  • Any infection due to a fungus of the zygomycota phylum. The disease typically involves the rhino-facial-cranial area, lungs, gastrointestinal tract, skin, or less commonly other organ systems. The infecting fungi have a predilection for invading vessels of the arterial system, causing embolization and subsequent necrosis of surrounding tissue.
  • 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.

Code History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change