ICD-10-CM > N00-N99 > N00-N08 > N03 > N03.A N03.A Chronic nephritic syndrome with C3 glomerulonephritis Billable/Specific Copy Code Copy Description Applicable To Chronic nephritic syndrome with C3 glomerulopathy Type 1 Excludes Chronic nephritic syndrome (with C3 glomerulopathy) with dense deposit disease (N03.6)