I12 vs N04
I12 (Hypertensive chronic kidney disease) compared with N04 (Nephrotic 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. N04 carries an Excludes1 note covering I12: “hypertensive chronic kidney disease (I12.-)”
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
| I12Hypertensive chronic kidney disease | N04Nephrotic syndrome | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Hypertensive chronic kidney disease is a non-billable ICD-10-CM category code (I12). | Nephrotic syndrome is a non-billable ICD-10-CM category code (N04). |
| Includes | any condition in N18 and N26 - due to hypertension arteriosclerosis of kidney arteriosclerotic nephritis (chronic) (interstitial) hypertensive nephropathy | congenital nephrotic syndrome lipoid nephrosis |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources