2027 ICD-10-CM Diagnosis Code B41.9Paracoccidioidomycosis, unspecified
ICD-10-CM Codes›A00–B99›B35-B49›B41
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
B41.9 is a billable ICD-10-CM diagnosis code for paracoccidioidomycosis, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791, 793, 867 through 869. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 10 closely related codes. Coders also document this condition as acute juvenile paracoccidioidomycosis. 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.
- Acute juvenile paracoccidioidomycosis
- Hypoadrenalism due to paracoccidioidomycosis
- Paracoccidioidomycosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B41.9: its own notes plus those printed at B41, 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.
- Brazilian blastomycosis
- Lutz' disease
- 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B41.9, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Paracoccidioidomycosis B41.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Paracoccidioidomycosis
a mycosis affecting the skin, mucous membranes, lymph nodes, and internal organs. it is caused most often by paracoccidioides brasiliensis. it is also called paracoccidioidal granuloma.
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 B41.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B41.9Overview
What is the ICD-10 code for paracoccidioidomycosis, unspecified?
The ICD-10-CM code for paracoccidioidomycosis, unspecified is B41.9 (sometimes written as B419). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B41.9 (Paracoccidioidomycosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report paracoccidioidomycosis, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B41.9 group to?
When paracoccidioidomycosis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 867, 869, 868, with relative weights from 0.6784 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B41.9 a CC or MCC?
CMS lists B41.9 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 10 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B41.9?
Under the General Equivalence Mappings, paracoccidioidomycosis, unspecified converts to ICD-9-CM 116.1 (paracoccidioidomycosis). The mapping is approximate, so confirm the match fits the documentation.
