2027 ICD-10-CM Diagnosis Code B42.9Sporotrichosis, unspecified
ICD-10-CM Codes›A00–B99›B35-B49›B42
- Billable — Valid for Submission
- Not Chronic
B42.9 is a billable ICD-10-CM diagnosis code for sporotrichosis, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869. Coders also document this condition as sporotrichosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Sporotrichosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B42.9: 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.
- 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.
- 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.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Sporotrichosis B42.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Convert B42.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B42.9Overview
What is the ICD-10 code for sporotrichosis, unspecified?
The ICD-10-CM code for sporotrichosis, unspecified is B42.9 (sometimes written as B429). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B42.9 (Sporotrichosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report sporotrichosis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B42.9 group to?
When sporotrichosis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 869, 868, with relative weights from 0.6784 to 2.1855 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of B42.9?
Under the General Equivalence Mappings, sporotrichosis, unspecified converts to ICD-9-CM 117.1 (sporotrichosis). The mapping is approximate, so confirm the match fits the documentation.
