N28.9 Disorder of kidney and ureter, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Nephropathy NOS
• Renal disease (acute) NOS
• Renal insufficiency (acute)

Excludes1 (never code together)

• chronic renal insufficiency (N18.9)
• unspecified nephritic syndrome (N05.-)

MS-DRG index

Defines the logic of DRG(s) 698-700 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 593.9 Unspecified disorder of kidney and ureter (approximate)

Code annotations containing back-references to N28.9

Back-references to N28.9

• Type 1 Excludes: N05 Unspecified nephritic syndrome ("nephropathy NOS with no stated morphological lesion (N28.9)")
• Type 1 Excludes: N05 Unspecified nephritic syndrome ("renal disease NOS with no stated morphological lesion (N28.9)")
• Type 1 Excludes: N19 Unspecified kidney failure ("renal insufficiency (acute) (N28.9)")

Diagnosis Index entries for N28.9

• Block, blocked › kidney
• Cachexia › renal
• Complication (s) (from) (of) › renal
• Depletion › salt or sodium › nephropathy
• Disease, diseased › kidney (functional) (pelvis)
• Disease, diseased › renal (functional) (pelvis)
• Disease, diseased › renal (functional) (pelvis) › acute
• Disease, diseased › ureter
• Disorder (of) › kidney
• Disorder (of) › ureter (in)
• Impaired, impairment (function) › kidney
• Impaired, impairment (function) › renal (acute) (chronic)
• Inefficiency, kidney
• Insufficiency, insufficient › kidney
• Insufficiency, insufficient › kidney › acute
• Insufficiency, insufficient › renal (acute)
• Low › function › kidney
• Nephropathy
• Nonfunctioning › kidney
• Shutdown, renal
• Suppression › renal

Nearby codes

• N28.83 Nephroptosis
• N28.84 Pyelitis cystica
• N28.85 Pyeloureteritis cystica
• N28.86 Ureteritis cystica
• N28.89 Other specified disorders of kidney and ureter
• N28.9 Disorder of kidney and ureter, unspecified (this code)