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ICD-10-CM 2027 diagnosis code

N39.0Urinary tract infection, site not specified

✓ Billable / specificCC — complication/comorbidity

N39.0 is a valid, billable ICD-10-CM code for urinary tract infection, site not specified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About N39.0

N39.0 is the ICD-10-CM diagnosis code for urinary tract infection, site not specified. It belongs to category N39 (other disorders of urinary system), block N30-N39 (other diseases of the urinary system) 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 N39 (other disorders of urinary system), N39.0 is specifically for urinary tract infection, site not specified. Related codes cover stress incontinence (female) (male) (N39.3), other specified urinary incontinence (N39.4), other specified disorders of urinary system (N39.8) and disorder of urinary system, unspecified (N39.9).

Don't report N39.0 together with the conditions in its Excludes1 note: candidiasis of urinary tract (B37.4-), neonatal urinary tract infection (P39.3), pyuria (R82.81), urinary tract infection of specified site, such as: and 3 more.

Use an additional code (B95-B97), to identify infectious agent..

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 599.0 (urinary tract infection, site not specified).

Coding notes

Excludes1Not coded here — never report together with this code
  • candidiasis of urinary tract (B37.4-)
  • neonatal urinary tract infection (P39.3)
  • pyuria (R82.81)
  • urinary tract infection of specified site, such as:
  • cystitis (N30.-)
  • pyonephrosis (N13.6)
  • urethritis (N34.-)
Use additional codeAdd a secondary code to fully describe the condition
  • code (B95-B97), to identify infectious agent.

Notes that apply from higher levels

Instructions written at a parent level also apply to N39.0.

› From N39 Other disorders of urinary system
Excludes2
  • hematuria NOS (R31.-)
  • recurrent or persistent hematuria (N02.-)
  • recurrent or persistent hematuria with specified morphological lesion (N02.-)
  • proteinuria NOS (R80.-)

Broader instructions also apply from N30-N39 Other diseases of the urinary system and Chapter 14: Diseases of the genitourinary system.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to N39.0.

Codes whose notes reference N39.0

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 →
  • 599.0Urinary tract infection, site not specifiedexact

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 N39.0

Is N39.0 billable?

Yes. N39.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can N39.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict N39.0 as a principal diagnosis.

Is N39.0 a CC or MCC?

N39.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does N39.0 group to?

N39.0 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 N39.0?

The CMS General Equivalence Mappings map N39.0 to ICD-9-CM 599.0.