ICD-10-CM 2027
ICD-10 code for kidney degeneration
From the official ICD-10-CM alphabetic index entry “Degeneration, degenerative › kidney”. Page updated September 29, 2026.
About coding kidney degeneration
The ICD-10-CM code for kidney degeneration is N28.89 (Other specified disorders of kidney and ureter). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N28.89.
Within N28.8, choose N28.89 (Other specified disorders of kidney and ureter) only when documentation doesn't support a more specific option: hypertrophy of kidney (N28.81), Megaloureter (N28.82), Nephroptosis (N28.83), Pyelitis cystica (N28.84), Pyeloureteritis cystica (N28.85) and Ureteritis cystica (N28.86).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific kidney degeneration codes (official index)
- amyloid E85.4 — Organ-limited amyloidosis
- cystic, congenital Q61.9 — Cystic kidney disease, unspecified
- fatty N28.89 — Other specified disorders of kidney and ureter
- polycystic Q61.3 — Polycystic kidney, unspecified
- adult type (autosomal dominant) Q61.2 — Polycystic kidney, adult type
- infantile type (autosomal recessive) NEC Q61.19 — Other polycystic kidney, infantile type
- collecting duct dilatation Q61.11 — Cystic dilatation of collecting ducts
Common questions about kidney degeneration ICD-10 codes
What is the ICD-10 code for kidney degeneration?
- N28.89 — Other specified disorders of kidney and ureter. More specific codes apply when the documentation supports them: E85.4, Q61.9, N28.89, Q61.3 and others below.
What is the ICD-10 code for amyloid kidney degeneration?
- E85.4 — Organ-limited amyloidosis.
What is the ICD-10 code for fatty kidney degeneration?
- N28.89 — Other specified disorders of kidney and ureter.
What is the ICD-10 code for polycystic kidney degeneration?
- Q61.3 — Polycystic kidney, unspecified.
Is N28.89 billable?
- Yes. N28.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N28.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N28.89 as a principal diagnosis.
Is N28.89 a CC or MCC?
- No. N28.89 is neither a CC nor an MCC under MS-DRG v44.0.