ICD-10-CM 2027
ICD-10 code for Pyoureter
From the official ICD-10-CM alphabetic index entry “Pyoureter”. Page updated September 29, 2026.
About coding Pyoureter
The ICD-10-CM code for Pyoureter is N28.89 (Other specified disorders of kidney and ureter). The official index lists 1 more specific code, 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 Pyoureter codes (official index)
- tuberculous A18.11 — Tuberculosis of kidney and ureter
Common questions about Pyoureter ICD-10 codes
What is the ICD-10 code for Pyoureter?
- N28.89 — Other specified disorders of kidney and ureter. More specific codes apply when the documentation supports them: A18.11.
What is the ICD-10 code for tuberculous pyoureter?
- A18.11 — Tuberculosis of kidney and ureter.
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.