What does ICD-10 code N20 mean?

ICD-10 code N20 is the standardized code used for calculus of kidney and ureter in medical records and coding systems.

When is ICD-10 code N20 used?

Doctors, hospitals, and insurers may use ICD-10 code N20 when recording calculus of kidney and ureter in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code N20 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code N20: Calculus of kidney and ureter

Name: ICD-10 Code N20: Calculus of kidney and ureter
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:26:35.041Z

N20 is an ICD-10 diagnosis entry used to group records related to Calculus of kidney and ureter. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the genitourinary system (N00-N99).

When is it used?

May be used when a clinician documents calculus of kidney and ureter in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

14Diseases of the genitourinary system (N00-N99)

block

N20-N23Urolithiasis

currentN20-N23

Official coding notes

Inclusion terms

Calculous pyelonephritis

Excludes1 (do not code together)

nephrocalcinosis (E83.59)
that with hydronephrosis (N13.2)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

UrologistGynecologist

Sibling codes

N21Calculus of lower urinary tract N22Calculus of urinary tract in diseases classified elsewherebillable N23Unspecified renal colicbillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

N20

Replacement codes

N20.0 — Calculus of kidneyN20.1 — Calculus of ureterN20.2 — Calculus of kidney with calculus of ureterN20.9 — Urinary calculus, unspecified

Common synonyms

Calculus of kidney and ureter

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.