N05.6 vs N05.A
N05.6 (Unspecified nephritic syndrome with dense deposit disease) compared with N05.A (Unspecified nephritic syndrome 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. N05.A carries an Excludes1 note covering N05.6: “Unspecified nephritic syndrome (with C3 glomerulopathy) with dense deposit disease (N05.6)”
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
| N05.6Unspecified nephritic syndrome with dense deposit disease | N05.AUnspecified nephritic syndrome 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 | Unspecified nephritic syndrome with dense deposit disease is a billable ICD-10-CM diagnosis code (N05.6). | Unspecified nephritic syndrome with C3 glomerulonephritis is a billable ICD-10-CM diagnosis code (N05.A). |
| Includes | glomerular disease NOS glomerulonephritis NOS nephritis NOS nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8 | glomerular disease NOS glomerulonephritis NOS nephritis NOS nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources