N28.81 vs R93.421
N28.81 (Hypertrophy of kidney) compared with R93.421 (Abnormal radiologic findings on diagnostic imaging of right kidney), 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. R93.421 carries an Excludes2 note covering N28.81: “hypertrophy of kidney (N28.81)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| N28.81Hypertrophy of kidney | R93.421Abnormal radiologic findings on diagnostic imaging of right kidney | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | N00-N99 — Diseases of the Genitourinary System (N00-N99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Hypertrophy of kidney is a billable ICD-10-CM diagnosis code (N28.81). | Abnormal radiologic findings on diagnostic imaging of right kidney is a billable ICD-10-CM diagnosis code (R93.421). |
| Includes | — | nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan] nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR] nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan] nonspecific abnormal findings on diagnostic imaging by thermography |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources