ICD-10 code for hookworm infestation

The ICD-10-CM code for hookworm infestation is B76.9 (Hookworm disease, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B76.9.

Within B76, choose B76.9 (Hookworm disease, unspecified) only when documentation doesn't support a more specific option: Ancylostomiasis (B76.0), necatoriasis (B76.1) and other hookworm diseases (B76.8).

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.