ICD-10 code for yellow fever

The ICD-10-CM code for yellow fever is A95.9 (Yellow fever, 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 A95.9.

Within A95, choose A95.9 (unspecified) only when documentation doesn't support a more specific option: Sylvatic yellow fever (A95.0) and urban yellow fever (A95.1).

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 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.