2026 ICD-10-CM Diagnosis Code B57.1Acute Chagas' disease without heart involvement
ICD-10-CM Codes›A00–B99›B50-B64›B57
- Billable — Valid for Submission
- Not Chronic
B57.1 is a billable ICD-10-CM diagnosis code for acute Chagas' disease without heart involvement. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. Coders also document this condition as acute Chagas' disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute Chagas' disease
- Acute Chagas disease without heart involvement
- Chagoma
- Trypanosomiasis affecting skin
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Acute Chagas' disease NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Chagas' (-Mazza) disease (chronic) - B57.2
- acute (with) - B57.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Chagas'(-Mazza) disease (chronic)
- acute (with)
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Chagas Disease
Chagas disease, or American trypanosomiasis, is an illness that can cause serious heart and stomach problems. It is caused by a parasite. Chagas disease is common in Latin America, especially in poor, rural areas. It can also be found in the United States, most often in people who were infected before they moved to the U.S.
The full article covers:
- What is Chagas disease?
- What causes Chagas disease?
- Who is more likely to develop Chagas disease?
- What are the symptoms of Chagas disease?
- How is Chagas disease diagnosed?
- What are the treatments for Chagas disease?
- Can Chagas disease be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B57.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B57.1Overview
Is B57.1 (Chagas' disease) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute Chagas' disease without heart involvement on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does B57.1 group to?
When acute Chagas' disease without heart involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of B57.1?
Under the General Equivalence Mappings, acute Chagas' disease without heart involvement converts to ICD-9-CM 086.2 (Chagas disease NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
