ICD-10 code for thorax syphilis

The ICD-10-CM code for thorax syphilis is A52.73 (Symptomatic late syphilis of other respiratory organs).

Within A52.7, choose A52.73 (Symptomatic late syphilis of other respiratory organs) only when documentation doesn't support a more specific option: late syphilitic oculopathy (A52.71), syphilis of lung and bronchus (A52.72), syphilis of liver and other viscera (A52.74), syphilis of kidney and ureter (A52.75), other genitourinary symptomatic late syphilis (A52.76), syphilis of bone and joint (A52.77), syphilis of other musculoskeletal tissue (A52.78) and other symptomatic late syphilis (A52.79).

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 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.