ICD-10 code for Pediculus infestation

The ICD-10-CM code for Pediculus infestation is B85.2 (Pediculosis, unspecified). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B85.2.

Within B85, choose B85.2 (Pediculosis, unspecified) only when documentation doesn't support a more specific option: pediculosis due to Pediculus humanus capitis (B85.0), pediculosis due to Pediculus humanus corporis (B85.1), phthiriasis (B85.3) and mixed pediculosis and phthiriasis (B85.4).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.