B65.1Schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis]

B65.1 is the ICD-10-CM diagnosis code for schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis]. It belongs to category B65 (schistosomiasis [bilharziasis]), block B65-B83 (helminthiases) 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 B65 (schistosomiasis [bilharziasis]), B65.1 is specifically for schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis]. Related codes cover schistosomiasis due to Schistosoma haematobium [urinary schistosomiasis] (B65.0), schistosomiasis due to Schistosoma japonicum (B65.2), Cercarial dermatitis (B65.3), other schistosomiasis (B65.8) and schistosomiasis, unspecified (B65.9).

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 441 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC, relative weight 1.8219), DRG 442 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC, relative weight 0.9602) and DRG 443 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC, relative weight 0.6885), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), 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 120.1 (schistosomiasis due to schistosoma mansoni).