All ICD10 Codes

N20-N23

Non-Billable
ChapterN00–N99
Rankblock
Official Description

Urolithiasis (N20-N23)

Use a more specific code (2 billable, 2 non-billable)
N20Calculus of kidney and ureterhas subcodesN21Calculus of lower urinary tracthas subcodesN22Calculus of urinary tract in diseases classified elsewhereN23Unspecified renal colic
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N20-N23Urolithiasis (N20-N23)Not billable
N20Calculus of kidney and ureterSubcodes
N21Calculus of lower urinary tractSubcodes
N22Calculus of urinary tract in diseases classified elsewhereBillable
N23Unspecified renal colicBillable

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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