2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Other mycoses, not elsewhere classified
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B48: its own notes plus those printed at block B35-B49 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block B35-B49 Mycoses applies to 104 codes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B48Overview

What is the ICD-10 code for other mycoses, not elsewhere classified?

B48 is the ICD-10-CM category for other mycoses, not elsewhere classified, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.