2027 ICD-10-CM Diagnosis Code B47.1Actinomycetoma
ICD-10-CM Codes›A00–B99›B35-B49›B47
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B47.1 is a billable ICD-10-CM diagnosis code for actinomycetoma. 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, 974 through 976. 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 14 closely related codes. 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.
- Actinomycetoma caused by Actinomadura madurae
- Actinomycetoma caused by Actinomadura pelletieri
- Actinomycetoma caused by Nocardia
- Actinomycetoma caused by Nocardia otitidis caviarum
- Actinomycetoma caused by Streptomyces somaliensis
- Actinomycotic madura foot
- Actinomycotic mycetoma
- Madura foot caused by Actinomadura pelletieri
- Madura foot caused by Streptomyces
- Madura foot caused by Streptomyces somaliensis
- Mycetoma of foot
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B47.1: its own notes plus those printed at B47, 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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B47.1, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Actinomycetoma (foot) B47.1
Infection, infected, infective (opportunistic) B99.9
Actinomadura B47.1
actinomycotic NEC B47.1
Streptomyces B47.1
actinomycotic B47.1
actinomycotic B47.1
actinomycotic B47.1
nocardial B47.1
Streptomycosis B47.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Actinomycetoma
a chronic granulomatous inflammation involving the deep dermis and the subcutaneous tissues. it is caused by actinomycetes bacteria.Mycetoma
a chronic progressive subcutaneous infection caused by species of fungi (eumycetoma), or actinomycetes (actinomycetoma). it is characterized by tumefaction, abscesses, and tumor-like granules representing microcolonies of pathogens, such as madurella fungi and bacteria actinomycetes, with different grain colors.
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 B47.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replaced This code was replaced in the FY 2027 code set by:
- J4B - Pulmonary mycetoma
Questions About B47.1Overview
What is the ICD-10 code for actinomycetoma?
The ICD-10-CM code for actinomycetoma is B47.1 (sometimes written as B471). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B47.1 (Mycetoma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report actinomycetoma on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B47.1 group to?
When actinomycetoma is the principal diagnosis on an inpatient stay, it groups to MS-DRG 974, 976, 975, 867, 869, 868, with relative weights from 0.6784 to 3.0488 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B47.1 a CC or MCC?
CMS lists B47.1 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 14 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B47.1?
Under the General Equivalence Mappings, actinomycetoma converts to ICD-9-CM 039.9 (actinomycosis NOS). The mapping is approximate, so confirm the match fits the documentation.
