N28.84 Pyelitis cystica

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from N28.8 Other specified disorders of kidney and ureter

Excludes1 (never code together)

• hydroureter (N13.4)
• ureteric stricture with hydronephrosis (N13.1)
• ureteric stricture without hydronephrosis (N13.5)

MS-DRG index

Defines the logic of DRG(s) 689-690 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 590.3 Pyeloureteritis cystica (approximate)

Diagnosis Index entries for N28.84

• Pyelitis (congenital) (uremic) › cystica

Nearby codes

• N28.1 Cyst of kidney, acquired
• N28.8 Other specified disorders of kidney and ureter
• N28.81 Hypertrophy of kidney
• N28.82 Megaloureter
• N28.83 Nephroptosis
• N28.84 Pyelitis cystica (this code)
• 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