ICD-10 code for retrovirus

The ICD-10-CM code for retrovirus is B97.30 (Unspecified retrovirus as the cause of diseases classified elsewhere). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B97.30.

Within B97.3, choose B97.30 (Unspecified retrovirus as the cause of diseases classified elsewhere) only when documentation doesn't support a more specific option: Lentivirus as the cause of diseases classified elsewhere (B97.31), Oncovirus as the cause of diseases classified elsewhere (B97.32), human T-cell lymphotrophic virus, type I [HTLV-I] as the cause of diseases classified elsewhere (B97.33), human T-cell lymphotrophic virus, type II [HTLV-II] as the cause of diseases classified elsewhere (B97.34), human immunodeficiency virus, type 2 [HIV 2] as the cause of diseases classified elsewhere (B97.35) and other retrovirus as the cause of diseases classified elsewhere (B97.39).

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 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), 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.