ICD-10 code for Shiga's bacillus

The ICD-10-CM code for Shiga's bacillus is A03.0 (Shigellosis due to Shigella dysenteriae).

Within A03 (shigellosis), A03.0 is specifically for shigellosis due to Shigella dysenteriae. Related codes cover due to Shigella flexneri (A03.1), due to Shigella boydii (A03.2), due to Shigella sonnei (A03.3), other shigellosis (A03.8) and unspecified (A03.9).

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 371 (Major Gastrointestinal Disorders and Peritoneal Infections with MCC, relative weight 1.7089), DRG 372 (Major Gastrointestinal Disorders and Peritoneal Infections with CC, relative weight 0.9964) and DRG 373 (Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC, relative weight 0.6941), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.