2027 ICD-10-CM Diagnosis Code B42Sporotrichosis

ICD-10-CM Codes›A00–B99›B35-B49›B42

ICD-10-CM B42
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Sporotrichosis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B42: 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.

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.

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 B42Overview

What is the ICD-10 code for sporotrichosis?

B42 is the ICD-10-CM category for sporotrichosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.