2027 ICD-10-CM Diagnosis Code B41.0Pulmonary paracoccidioidomycosis
ICD-10-CM Codes›A00–B99›B35-B49›B41
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
B41.0 is a billable ICD-10-CM diagnosis code for pulmonary paracoccidioidomycosis. 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 pulmonary fibrosis due to paracoccidioidomycosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections and Other specified and unspecified lower respiratory disease.
B41.0 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 115 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 115, ESRD (V21) category 115, and ESRD (V24) category 115 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
B41.0 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Pulmonary fibrosis due to paracoccidioidomycosis
- Pulmonary paracoccidioidomycosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B41.0: 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 B41.0, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
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 B41.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B41.0Overview
What is the ICD-10 code for pulmonary paracoccidioidomycosis?
The ICD-10-CM code for pulmonary paracoccidioidomycosis is B41.0 (sometimes written as B410). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B41.0 (Paracoccidioidomycosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pulmonary paracoccidioidomycosis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B41.0 group to?
When pulmonary paracoccidioidomycosis 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 B41.0 a CC or MCC?
CMS lists B41.0 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 B41.0?
Under the General Equivalence Mappings, pulmonary paracoccidioidomycosis converts to ICD-9-CM 116.1 (paracoccidioidomycosis). The mapping is approximate, so confirm the match fits the documentation.
Does B41.0 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. B41.0 mapped to HCC 115 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 115 (Pneumococcal Pneumonia/Empyema/Lung Abscess), ESRD (V21) category 115 (Pneumococcal Pneumonia/Empyema/Lung Abscess), and ESRD (V24) category 115 (Pneumococcal Pneumonia/Empyema/Lung Abscess).
