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ICD-10-CM 2027 diagnosis code

N20.2Calculus of kidney with calculus of ureter

✓ Billable / specificCC — complication/comorbidity

N20.2 is a valid, billable ICD-10-CM code for calculus of kidney with calculus of ureter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About N20.2

N20.2 is the ICD-10-CM diagnosis code for calculus of kidney with calculus of ureter. It belongs to category N20 (calculus of kidney and ureter), block N20-N23 (Urolithiasis) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within N20 (calculus of kidney and ureter), N20.2 is specifically for calculus of kidney with calculus of ureter. Related codes cover calculus of kidney (N20.0), calculus of ureter (N20.1) and urinary calculus, unspecified (N20.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 693 (Urinary Stones with MCC, relative weight 1.3168) and DRG 694 (Urinary Stones without MCC, relative weight 0.7815), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 592.0 (calculus of kidney) and 592.1 (calculus of ureter).

Notes that apply from higher levels

Instructions written at a parent level also apply to N20.2.

› From N20 Calculus of kidney and ureter
Excludes1
  • nephrocalcinosis (E83.59)
  • that with hydronephrosis (N13.2)

Broader instructions also apply from Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to N20.2.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 11 · Diseases and Disorders of the Kidney and Urinary Tract

ICD-9-CM equivalent

Converter →
  • 592.0Calculus of kidneyapproximate, combination
  • 592.1Calculus of ureterapproximate, combination

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about N20.2

Is N20.2 billable?

Yes. N20.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N20.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N20.2 as a principal diagnosis.

Is N20.2 a CC or MCC?

N20.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does N20.2 group to?

N20.2 is used in the MS-DRG v44.0 logic for MS-DRG 693 (Urinary Stones with MCC) and MS-DRG 694 (Urinary Stones without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for N20.2?

The CMS General Equivalence Mappings map N20.2 to ICD-9-CM 592.0 and 592.1.