Is ICD-10-CM code N20-N23 billable?

No, N20-N23 (Urolithiasis (N20-N23)) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code N20-N23 belong to?

N20-N23 belongs to Chapter 14 of the ICD-10-CM tabular list: N00–N99 (Diseases of the Genitourinary System).

N20-N23

Non-Billable

ChapterN00–N99

Rankblock

Description

Urolithiasis (N20-N23)

About ICD-10-CM code N20-N23

N20-N23 is the ICD-10-CM diagnosis code for Urolithiasis (N20-N23). It sits in N00-N99 Diseases of the Genitourinary System. N20-N23 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (2 billable, 2 non-billable)

N20Calculus of kidney and ureterhas subcodes N21Calculus of lower urinary tracthas subcodes N22Calculus of urinary tract in diseases classified elsewhere N23Unspecified 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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