2027 ICD-10-CM Diagnosis Code P39.3Neonatal urinary tract infection
ICD-10-CM Codes›P00–P96›P35-P39›P39
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
P39.3 is a billable ICD-10-CM diagnosis code for neonatal urinary tract infection. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 54 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Perinatal infections.
Code Identity
Code Classification
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 colibacillosis
- Neonatal urinary tract infection
- Neonatal urinary tract infection caused by Escherichia coli
- 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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P39.3: its own notes plus those printed at P39, block P35-P39, and Chapter 16. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
- congenital gonococcal infection (A54.-)
- congenital pneumonia (P23.-)
- congenital syphilis (A50.-)
- human immunodeficiency virus [HIV] disease (B20)
- infant botulism (A48.51)
- infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)
- intestinal infectious disease (A00-A09)
- laboratory evidence of human immunodeficiency virus [HIV] (R75)
- tetanus neonatorum (A33)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify organism or specific infection
Notes
General instructions on how these codes are used.
- Codes from this chapter are for use on newborn records only, never on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name P39.3, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming P39.3: they are not reported together with it, unless the two conditions are unrelated.
- N39.0 Urinary tract infection, site not specifiedneonatal urinary tract infection (P39.3)
Excludes2 2
These codes carry an Excludes2 note naming P39.3: its condition is not part of those codes, and both may be reported when the patient has both.
- Chapter 1 (A00-B99) Certain infectious and parasitic diseases
- P00.2 Newborn affected by maternal infectious and parasitic diseases
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Code HistoryHistory
Questions About P39.3Overview
What is the ICD-10 code for neonatal urinary tract infection?
The ICD-10-CM code for neonatal urinary tract infection is P39.3 (sometimes written as P393). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does P39.3 group to?
When neonatal urinary tract infection is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, with relative weights from 4.1073 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is P39.3 a CC or MCC?
CMS lists P39.3 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 54 closely related codes in its exclusion list.
Does P39.3 need an additional code?
When the condition applies, yes. The Use Additional Code note at P39, which applies to P39.3, reads: code to identify organism or specific infection. The additional code is reported after P39.3.
