A18.85Tuberculosis of spleen

A18.85 is the ICD-10-CM diagnosis code for tuberculosis of spleen. It belongs to category A18 (tuberculosis of other organs), block A15-A19 (tuberculosis) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A18.8 (tuberculosis of other specified organs), A18.85 is specifically for tuberculosis of spleen. Related codes cover thyroid gland (A18.81), other endocrine glands (A18.82), digestive tract organs, not elsewhere classified (A18.83), heart (A18.84) and other sites (A18.89).

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 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444), DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 017.70 (tuberculosis of spleen, unspecified).