N01.A vs N05
N01.A (Rapidly progressive nephritic syndrome with C3 glomerulonephritis) compared with N05 (Unspecified nephritic syndrome), 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. N01.A carries an Excludes1 note covering N05: “nephritic syndrome NOS (N05.-)”
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
| N01.ARapidly progressive nephritic syndrome with C3 glomerulonephritis | N05Unspecified nephritic syndrome | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Rapidly progressive nephritic syndrome with C3 glomerulonephritis is a billable ICD-10-CM diagnosis code (N01.A). | Unspecified nephritic syndrome is a non-billable ICD-10-CM category code (N05). |
| Includes | rapidly progressive glomerular disease rapidly progressive glomerulonephritis rapidly progressive nephritis Rapidly progressive nephritic syndrome with C3 glomerulopathy, NOS | 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