ICD-10-CM 2027
ICD-10 code for calculous anuria
From the official ICD-10-CM alphabetic index entry “Anuria › calculous (impacted) (recurrent)”. Page updated September 29, 2026.
About coding calculous anuria
The ICD-10-CM code for calculous anuria is N20.9 (Urinary calculus, unspecified).
Within N20, choose N20.9 (Urinary calculus, unspecified) only when documentation doesn't support a more specific option: calculus of kidney (N20.0), calculus of ureter (N20.1) and calculus of kidney with calculus of ureter (N20.2).
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 693 (Urinary Stones with MCC, relative weight 1.3168) and DRG 694 (Urinary Stones without MCC, relative weight 0.7815), 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.
Common questions about calculous anuria ICD-10 codes
What is the ICD-10 code for calculous anuria?
- N20.9 — Urinary calculus, unspecified.
Is N20.9 billable?
- Yes. N20.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N20.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N20.9 as a principal diagnosis.
Is N20.9 a CC or MCC?
- No. N20.9 is neither a CC nor an MCC under MS-DRG v44.0.