ICD-10-CM 2027
ICD-10 code for renal disease
From the official ICD-10-CM alphabetic index entry “Disease, diseased › renal (functional) (pelvis)”. Page updated September 29, 2026.
About coding renal disease
The ICD-10-CM code for renal disease is N28.9 (Disorder of kidney and ureter, unspecified). The official index lists 15 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N28.9.
Within N28, choose N28.9 (Disorder of kidney and ureter, unspecified) only when documentation doesn't support a more specific option: ischemia and infarction of kidney (N28.0), cyst of kidney, acquired (N28.1) and other specified disorders of kidney and ureter (N28.8).
Don't report N28.9 together with the conditions in its Excludes1 note: chronic renal insufficiency (N18.9) and unspecified nephritic syndrome (N05.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific renal disease codes (official index)
- with
- edema
- glomerular lesion
- with edema
- interstitial nephritis N12 — Tubulo-interstitial nephritis, not specified as acute or chronic
- acute N28.9 — Disorder of kidney and ureter, unspecified
- chronic N18.9 — Chronic kidney disease, unspecified
- cystic, congenital Q61.9 — Cystic kidney disease, unspecified
- diabetic
- end-stage (failure) N18.6 — End stage renal disease
- due to hypertension I12.0 — Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease
- fibrocystic (congenital) Q61.8 — Other cystic kidney diseases
- hypertensive
- lupus M32.14 — Glomerular disease in systemic lupus erythematosus
- phosphate-losing (tubular) N25.0 — Renal osteodystrophy
- polycystic (congenital) Q61.3 — Polycystic kidney, unspecified
- adult type Q61.2 — Polycystic kidney, adult type
- childhood type NEC Q61.19 — Other polycystic kidney, infantile type
- collecting duct dilatation Q61.11 — Cystic dilatation of collecting ducts
- rapidly progressive N01.9 — Rapidly progressive nephritic syndrome with unspecified morphologic changes
- subacute N01.9 — Rapidly progressive nephritic syndrome with unspecified morphologic changes
Don't confuse with (Excludes1 for N28.9)
Common questions about renal disease ICD-10 codes
What is the ICD-10 code for renal disease?
- N28.9 — Disorder of kidney and ureter, unspecified. More specific codes apply when the documentation supports them: N12, N28.9, N18.9, Q61.9 and others below.
What is the ICD-10 code for acute renal disease?
- N28.9 — Disorder of kidney and ureter, unspecified.
What is the ICD-10 code for chronic renal disease?
- N18.9 — Chronic kidney disease, unspecified.
What is the ICD-10 code for end-stage renal disease?
- N18.6 — End stage renal disease.
What is the ICD-10 code for fibrocystic renal disease?
- Q61.8 — Other cystic kidney diseases.
What is the ICD-10 code for lupus renal disease?
- M32.14 — Glomerular disease in systemic lupus erythematosus.
What is the ICD-10 code for phosphate-losing renal disease?
- N25.0 — Renal osteodystrophy.
Is N28.9 billable?
- Yes. N28.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N28.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N28.9 as a principal diagnosis.
Is N28.9 a CC or MCC?
- No. N28.9 is neither a CC nor an MCC under MS-DRG v44.0.