All ICD10 Codes

N20

Non-Billable
ChapterN00–N99
Rankcategory
Official Description

Calculus of kidney and ureter

Use a more specific code (4 billable)
N20.0Calculus of kidneyN20.1Calculus of ureterN20.2Calculus of kidney with calculus of ureterN20.9Urinary calculus, unspecified
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)

Instructional Notes

Includes
  • Calculous pyelonephritis
Excludes1(Not coded here. Use a different code.)
  • nephrocalcinosis (E83.59)
  • that with hydronephrosis (N13.2)

Clinical Hierarchy

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N20-N23Urolithiasis (N20-N23)
N20Calculus of kidney and ureterNot billable
N20.0Calculus of kidneyBillable
N20.1Calculus of ureterBillable
N20.2Calculus of kidney with calculus of ureterBillable
N20.9Urinary calculus, unspecifiedBillable

Applicable Ancestor Context

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

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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