N28.0Ischemia and infarction of kidney

N28.0 is the ICD-10-CM diagnosis code for ischemia and infarction of kidney. It belongs to category N28 (other disorders of kidney and ureter, not elsewhere classified), block N25-N29 (other disorders of kidney and ureter) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within N28 (other disorders of kidney and ureter, not elsewhere classified), N28.0 is specifically for ischemia and infarction of kidney. Related codes cover cyst of kidney, acquired (N28.1), other specified disorders of kidney and ureter (N28.8) and disorder of kidney and ureter, unspecified (N28.9).

Don't report N28.0 together with the conditions in its Excludes1 note: atherosclerosis of renal artery (extrarenal part) (I70.1), congenital stenosis of renal artery (Q27.1) and Goldblatt's kidney (I70.1).

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 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.

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 593.81 (vascular disorders of kidney).