N21.9 CALCULUS OF LOWER URINARY TRACT, UNSPECIFIED

Code Information

  • Diagnosis Code: N21.9
  • Short Description: Calculus of lower urinary tract, unspecified
  • Long Description: Calculus of lower urinary tract, unspecified
  • Code Version: 2025 ICD-10-CM

The code N21.9 is VALID for claim submission

Code Classification

Synonyms

  • Calculus of lower urinary tract

Diagnostic Related Group(s)

The code N21.9 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

  1. Urinary Stones With Mcc (693)
  2. Urinary Stones Without Mcc (694)

References to Index of Diseases and Injuries

The code N21.9 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Type 1 Excludes Notes:
    • calculus of urinary tract NOS (@N20.9*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
N21.9 Right Arrow 594.9 Lower urin calcul NOS
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
N21 Calculus of lower urinary tract
N21.0 Calculus in bladder
N21.1 Calculus in urethra
N21.8 Other lower urinary tract calculus
This page was last updated on: 10/1/2025
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