ICD-10 code for Spirochetosis

The ICD-10-CM code for Spirochetosis is A69.9 (Spirochetal infection, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A69.9.

Within A69, choose A69.9 (Spirochetal infection, unspecified) only when documentation doesn't support a more specific option: necrotizing ulcerative stomatitis (A69.0), other Vincent's infections (A69.1), Lyme disease (A69.2) and other specified spirochetal infections (A69.8).

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 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235) and DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), 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.