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Compare/N03 vs N05

N03 vs N05

N03 (Chronic nephritic syndrome) 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. N03 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

N03Chronic nephritic syndromeN05Unspecified nephritic syndrome
Billing statusNon-billable header

Report instead: N03.0, N03.1, N03.2, N03.3, N03.4

Non-billable header

Report instead: N05.0, N05.1, N05.2, N05.3, N05.4

ClassificationN00-N99 — Diseases of the Genitourinary System (N00-N99)N00-N99 — Diseases of the Genitourinary System (N00-N99)
DefinitionChronic nephritic syndrome is a non-billable ICD-10-CM category code (N03).Unspecified nephritic syndrome is a non-billable ICD-10-CM category code (N05).
Includes
chronic glomerular disease
chronic glomerulonephritis
chronic nephritis
glomerular disease NOS
glomerulonephritis NOS
nephritis NOS
nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources