N20 vs N29
N20 (Calculus of kidney and ureter) compared with N29 (Other disorders of kidney and ureter in diseases classified elsewhere), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. N29 carries an Excludes2 note covering N20: “disorders of kidney and ureter with urolithiasis (N20-N23)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| N20Calculus of kidney and ureter | N29Other disorders of kidney and ureter in diseases classified elsewhere | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Calculus of kidney and ureter is a non-billable ICD-10-CM category code (N20). | Other disorders of kidney and ureter in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (N29). |
| Includes | Calculous pyelonephritis | — |
| Code first | — | underlying disease, such as: amyloidosis (E85.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources