2026 ICD-10-CM Diagnosis Code P39.3Neonatal urinary tract infection

ICD-10-CM Codes›P00–P96›P35-P39›P39

ICD-10-CM P39.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P39.3 is a billable ICD-10-CM diagnosis code for neonatal urinary tract infection. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Perinatal infections.

Code Identity

ICD-10-CM Code
P39.3
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal urinary tract infection
Short Description
Neonatal urinary tract infection
Same as the full description in the CMS dataset.
Parent Code
P39
Other infections specific to the perinatal period

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP35-P39Infections specific to the perinatal period
CategoryP39Other infections specific to the perinatal period
This CodeP39.3Neonatal urinary tract infection

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute lower urinary tract infection
  • Acute upper urinary tract infection
  • Acute urinary tract infection
  • Bacterial urinary infection
  • Coliform urinary tract infection
  • Febrile urinary tract infection
  • Infection caused by Enterococcus
  • Lower urinary tract infectious disease
  • Neonatal urinary tract infection
  • Pseudomonas aeruginosa urinary tract infection
  • Sepsis due to urinary tract infection
  • Upper urinary tract infection
  • Urinary tract infection caused by Enterococcus
  • Urinary tract infection caused by Escherichia coli
  • Urinary tract infection caused by Klebsiella
  • Urinary tract infection caused by Pseudomonas
  • Urinary tract infection caused by Streptococcus agalactiae
  • Urinary tract infectious disease

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Infection, infected, infective(opportunistic)
      • congenital
        • urinary (tract)
    • Infection, infected, infective(opportunistic)
      • urinary (tract)
        • newborn
    • Newborn(infant) (liveborn) (singleton)
      • infection
        • urinary tract

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PNL009
Perinatal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Uncommon Infant and Newborn Problems

It can be scary when your baby is sick, especially when it is not an everyday problem like a cold or a fever. You may not know whether the problem is serious or how to treat it. If you have concerns about your baby's health, call your health care provider right away.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert P39.3 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
771.82 NB urinary tract infectn
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P39.3Overview

Is P39.3 (Other infections specific to the perinatal period) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report neonatal urinary tract infection on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P39.3?

Under the General Equivalence Mappings, neonatal urinary tract infection converts to ICD-9-CM 771.82 (NB urinary tract infectn). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.