N20-N23

Non-Billable
ChapterN00–N99
Rankblock
Official Description

Urolithiasis (N20-N23)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Clinical Hierarchy

CH14Diseases of the genitourinary system (N00-N99)
N20-N23Urolithiasis (N20-N23)
N20Calculus of kidney and ureter
N21Calculus of lower urinary tract
N22Calculus of urinary tract in diseases classified elsewhere
N23Unspecified renal colic

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N20-N23:

chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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