ICD-10 code for cystostomy stoma malfunction

The ICD-10-CM code for cystostomy stoma malfunction is N99.512 (Cystostomy malfunction). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N99.512.

Within N99.51 (complication of cystostomy), N99.512 is specifically for cystostomy malfunction. Related codes cover cystostomy hemorrhage (N99.510), cystostomy infection (N99.511) and other cystostomy complication (N99.518).

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 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.