2026 ICD-10-CM Diagnosis Code B48Other mycoses, not elsewhere classified

ICD-10-CM Codes›A00–B99›B35-B49›B48

ICD-10-CM B48
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B48 is a non-billable ICD-10-CM category code for other mycoses, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B48.0, B48.1, B48.2, and B48.3.

Code Identity

ICD-10-CM Code
B48
Billable Status
No — Non-Billable Category
Code Describes
Other mycoses, not elsewhere classified
Chapter
B35-B49
Mycoses

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB48Other mycoses, not elsewhere classified
This CodeB48Other mycoses, not elsewhere classified

Specific Coding for Other mycoses, not elsewhere classifiedOverview

Non-specific codes like B48 require more characters. Use one of these billable codes instead:

  • Use B48.0 for Lobomycosis

  • Use B48.1 for Rhinosporidiosis

  • Use B48.2 for Allescheriasis

  • Use B48.3 for Geotrichosis

  • Use B48.4 for Penicillosis

  • Use B48.8 for Other specified mycoses

Patient EducationClinical

Fungal Infections

If you have ever had athlete's foot or a yeast infection, you can blame a fungus. A fungus is a primitive organism. Mushrooms, mold and mildew are examples. Fungi live in air, in soil, on plants and in water. Some live in the human body. Only about half of all types of fungi are harmful.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B48Overview

Is B48 (Other mycoses, not elsewhere classified) a billable code?

No. This is a category header that groups the codes for other mycoses, not elsewhere classified, and headers cannot be submitted on claims. Claims for other mycoses, not elsewhere classified need a more specific code from this category, such as B48.0, B48.1, and B48.2.