2026 ICD-10-CM Diagnosis Code B42Sporotrichosis

ICD-10-CM Codes›A00–B99›B35-B49›B42

ICD-10-CM B42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B42 is a non-billable ICD-10-CM category code for sporotrichosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B42.0, B42.1, B42.7, and B42.81.

Code Identity

ICD-10-CM Code
B42
Billable Status
No — Non-Billable Category
Code Describes
Sporotrichosis
Chapter
B35-B49
Mycoses

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB35-B49Mycoses
CategoryB42Sporotrichosis
This CodeB42Sporotrichosis

Specific Coding for SporotrichosisOverview

Non-specific codes like B42 require more characters. Use one of these billable codes instead:

  • Use B42.0 for Pulmonary sporotrichosis

  • Use B42.1 for Lymphocutaneous sporotrichosis

  • Use B42.7 for Disseminated sporotrichosis

  • B42.8 for Other forms of sporotrichosis

  • Use B42.81 for Cerebral sporotrichosis

  • Use B42.82 for Sporotrichosis arthritis

  • Use B42.89 for Other forms of sporotrichosis

  • Use B42.9 for Sporotrichosis, unspecified

Clinical InformationClinical

  • Sporotrichosis

    the commonest and least serious of the deep mycoses, characterized by nodular lesions of the cutaneous and subcutaneous tissues. it is caused by inhalation of contaminated dust or by infection of a wound with sporothrix.

  • Sporothrix

    a mitosporic ophiostomataceae fungal genus, whose species sporothrix schenckii is a well-known animal pathogen. the conidia of this soil fungus may be inhaled causing a primary lung infection, or may infect independently via skin punctures.

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 B42Overview

Is B42 (Sporotrichosis) a billable code?

No. This is a category header that groups the codes for sporotrichosis, and headers cannot be submitted on claims. Claims for sporotrichosis need a more specific code from this category, such as B42.0, B42.1, and B42.7.