N06.6 vs N06.A
N06.6 (Isolated proteinuria with dense deposit disease) compared with N06.A (Isolated proteinuria with C3 glomerulonephritis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. N06.A carries an Excludes1 note covering N06.6: “Isolated proteinuria (with C3 glomerulopathy) with dense deposit disease (N06.6)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| N06.6Isolated proteinuria with dense deposit disease | N06.AIsolated proteinuria with C3 glomerulonephritis | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Isolated proteinuria with dense deposit disease is a billable ICD-10-CM diagnosis code (N06.6). | Isolated proteinuria with C3 glomerulonephritis is a billable ICD-10-CM diagnosis code (N06.A). |
| Includes | Isolated proteinuria with C3 glomerulopathy with dense deposit disease Isolated proteinuria with membranoproliferative glomerulonephritis, type 2 | Isolated proteinuria with C3 glomerulopathy |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources