ICD-10 code for acute glomerulonephritis

The ICD-10-CM code for acute glomerulonephritis is N00.9 (Acute nephritic syndrome with unspecified morphologic changes).

Within N00, choose N00.9 (with unspecified morphologic changes) only when documentation doesn't support a more specific option: with minor glomerular abnormality (N00.0), with focal and segmental glomerular lesions (N00.1), with diffuse membranous glomerulonephritis (N00.2), with diffuse mesangial proliferative glomerulonephritis (N00.3), with diffuse endocapillary proliferative glomerulonephritis (N00.4), with diffuse mesangiocapillary glomerulonephritis (N00.5), with dense deposit disease (N00.6), with diffuse crescentic glomerulonephritis (N00.7) and 3 more.

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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), DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.