B57.1Acute Chagas' disease without heart involvement

B57.1 is the ICD-10-CM diagnosis code for acute Chagas' disease without heart involvement. It belongs to category B57 (Chagas' disease), block B50-B64 (protozoal diseases) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within B57, choose B57.1 (Acute Chagas' disease without heart involvement) only when documentation doesn't support a more specific option: acute Chagas' disease with heart involvement (B57.0), (chronic) with heart involvement (B57.2), (chronic) with digestive system involvement (B57.3), (chronic) with nervous system involvement (B57.4) and (chronic) with other organ involvement (B57.5).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235) and DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 086.2 (Chagas' disease without mention of organ involvement).