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ICD-10-CM 2027 diagnosis code

N28.86Ureteritis cystica

✓ Billable / specificCC — complication/comorbidity

N28.86 is a valid, billable ICD-10-CM code for ureteritis cystica. 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 N28.86

N28.86 is the ICD-10-CM diagnosis code for Ureteritis cystica. It belongs to category N28 (other disorders of kidney and ureter, not elsewhere classified), block N25-N29 (other disorders of kidney and ureter) 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 N28.8 (other specified disorders of kidney and ureter), N28.86 is specifically for Ureteritis cystica. Related codes cover hypertrophy of kidney (N28.81), Megaloureter (N28.82), Nephroptosis (N28.83), Pyelitis cystica (N28.84), Pyeloureteritis cystica (N28.85) and other specified disorders of kidney and ureter (N28.89).

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 689 (Kidney and Urinary Tract Infections with MCC, relative weight 1.1415), DRG 690 (Kidney and Urinary Tract Infections without MCC, relative weight 0.801), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), 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 590.3 (Pyeloureteritis cystica).

Notes that apply from higher levels

Instructions written at a parent level also apply to N28.86.

› From N28.8 Other specified disorders of kidney and ureter
Excludes1
  • hydroureter (N13.4)
  • ureteric stricture with hydronephrosis (N13.1)
  • ureteric stricture without hydronephrosis (N13.5)

Broader instructions also apply from N25-N29 Other disorders of kidney and ureter and Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to N28.86.

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 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 590.3Pyeloureteritis cysticaapproximate

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 N28.86

Is N28.86 billable?

Yes. N28.86 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N28.86 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N28.86 as a principal diagnosis.

Is N28.86 a CC or MCC?

N28.86 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does N28.86 group to?

N28.86 is used in the MS-DRG v44.0 logic for MS-DRG 689 (Kidney and Urinary Tract Infections with MCC), MS-DRG 690 (Kidney and Urinary Tract Infections without MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). 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 N28.86?

The CMS General Equivalence Mappings map N28.86 to ICD-9-CM 590.3.