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

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Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
10 Excludes2 · 1 use-additional code

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Use additional codeReport with this code when documented
  • code to identify organism or specific infection
Excludes2Not included here; may be reported together
  • asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
  • congenital gonococcal infection (A54.-)
  • congenital pneumonia (P23.-)
  • congenital syphilis (A50.-)

+6 more in Instructions

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for P39.3 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on P39.3 itself; “inherited from” names the category or block whose note applies here.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code to identify organism or specific infection

Source: inherited from P39

Coder workflow for P39.3

MedCoder structured workflow — derived from this code’s own official record

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Excludes2 — not part of P39.3(10 notes)

    Coding workflow: The conditions named in this note are not included in P39.3. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareZ21, A54, P23, A50, B20, A48.51

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying P39.3(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with P39.3 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with P39.3?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse P39.3 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of P39.3 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • P39.9— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Infection specific to the perinatal period, unspecified” takes P39.9; specificity in the record moves it back here.

    Full comparison: P39.3 vs P39.9 →

  • Z21— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of asymptomatic human immunodeficiency virus [HIV] infection status adds Z21; it is not part of this code and both may be reported when both are documented.

    Full comparison: P39.3 vs Z21 →

  • A54— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of congenital gonococcal infection adds A54; it is not part of this code and both may be reported when both are documented.

    Full comparison: P39.3 vs A54 →

  • P23— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of congenital pneumonia adds P23; it is not part of this code and both may be reported when both are documented.

    Full comparison: P39.3 vs P23 →

  • A50— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of congenital syphilis adds A50; it is not part of this code and both may be reported when both are documented.

    Full comparison: P39.3 vs A50 →

  • B20— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of human immunodeficiency virus [HIV] disease adds B20; it is not part of this code and both may be reported when both are documented.

    Full comparison: P39.3 vs B20 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Neonatal urinary tract infection is a billable ICD-10-CM diagnosis code (P39.3).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Verify Before Coding

  • CC as a secondary diagnosis (FY2027). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name P39.3 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes1 note: N39.0 — Urinary tract infection, site not specified.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Excludes2 note: P00.2 — Newborn affected by maternal infectious and parasitic diseases (via P39.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 54 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 2 MS-DRGs: DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):PNL009 — Perinatal infections (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

N80.A42 — Superficial endometriosis of left ureter, N80.A43 — Superficial endometriosis of bilateral ureters, N80.A49 — Superficial endometriosis of unspecified ureter, N80.A51 — Deep endometriosis of right ureter, N80.A52 — Deep endometriosis of left ureter, N80.A53 — Deep endometriosis of bilateral ureters, N80.A59 — Deep endometriosis of unspecified ureter, N80.A61 — Endometriosis of right ureter, unspecified depth, N80.A62 — Endometriosis of left ureter, unspecified depth, N80.A63 — Endometriosis of bilateral ureters, unspecified depth, N80.A69 — Endometriosis of unspecified ureter, unspecified depth, N99.511 — Cystostomy infection, P39.2 — Intra-amniotic infection affecting newborn, not elsewhere classified, P39.4 — Neonatal skin infection, P39.8 — Other specified infections specific to the perinatal period, P39.9 — Infection specific to the perinatal period, unspecified, R30.0 — Dysuria, R30.9 — Painful micturition, unspecified, R82.71 — Bacteriuria, T83.511A — Infection and inflammatory reaction due to indwelling urethral catheter, initial encounter, +33 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Perinatal infections).

P36.4 — Sepsis of newborn due to Escherichia coli, P36.5 — Sepsis of newborn due to anaerobes, P36.8 — Other bacterial sepsis of newborn, P36.9 — Bacterial sepsis of newborn, unspecified, P37.0 — Congenital tuberculosis, P37.1 — Congenital toxoplasmosis, P37.2 — Neonatal (disseminated) listeriosis, P37.3 — Congenital falciparum malaria, P37.4 — Other congenital malaria, P37.5 — Neonatal candidiasis, P37.8 — Other specified congenital infectious and parasitic diseases, P37.9 — Congenital infectious or parasitic disease, unspecified, P38.1 — Omphalitis with mild hemorrhage, P38.9 — Omphalitis without hemorrhage, P39.0 — Neonatal infective mastitis, P39.1 — Neonatal conjunctivitis and dacryocystitis, P39.2 — Intra-amniotic infection affecting newborn, not elsewhere classified, P39.4 — Neonatal skin infection, P39.8 — Other specified infections specific to the perinatal period, P39.9 — Infection specific to the perinatal period, unspecified, +57 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Newborn”; these codes share that main term but sit in a different category of the Tabular List.

P36.2 — Sepsis of newborn due to Staphylococcus aureus (sepsis, due to, Staphylococcus, aureus), P36.30 — Sepsis of newborn due to unspecified staphylococci (sepsis, due to, Staphylococcus), P36.39 — Sepsis of newborn due to other staphylococci (sepsis, due to, Staphylococcus, specified NEC), P36.4 — Sepsis of newborn due to Escherichia coli (sepsis, due to, Escherichia coli), P36.5 — Sepsis of newborn due to anaerobes (sepsis, due to, anaerobes NEC), P36.8 — Other bacterial sepsis of newborn (sepsis, specified NEC), P36.9 — Bacterial sepsis of newborn, unspecified (sepsis), P37.5 — Neonatal candidiasis (infection, candidal), P38.1 — Omphalitis with mild hemorrhage (omphalitis, with mild hemorrhage), P38.9 — Omphalitis without hemorrhage (omphalitis), P50.0 — Newborn affected by intrauterine (fetal) blood loss from vasa previa (affected by, vasa previa, from intrauterine blood loss), P50.1 — Newborn affected by intrauterine (fetal) blood loss from ruptured cord (affected by, intrauterineblood loss, due to, ruptured cord blood), P50.2 — Newborn affected by intrauterine (fetal) blood loss from placenta (affected by, intrauterineblood loss, due to, placenta), P50.3 — Newborn affected by hemorrhage into co-twin (affected by, intrauterineblood loss, due to, hemorrhage into, co-twin), P50.4 — Newborn affected by hemorrhage into maternal circulation (affected by, intrauterineblood loss, due to, hemorrhage into, maternal circulation), P50.5 — Newborn affected by intrauterine (fetal) blood loss from cut end of co-twin's cord (affected by, intrauterineblood loss, due to, cut end of co-twin cord), P50.8 — Newborn affected by other intrauterine (fetal) blood loss (affected by, intrauterineblood loss, specified NEC), P50.9 — Newborn affected by intrauterine (fetal) blood loss, unspecified (affected by, intrauterineblood loss), P52.0 — Intraventricular (nontraumatic) hemorrhage, grade 1, of newborn (affected by, hemorrhage, subependymal), P52.1 — Intraventricular (nontraumatic) hemorrhage, grade 2, of newborn (affected by, bleeding, ventricles), +145 more

Contextual Map

Every relationship of P39.3 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run P39.3 with these 2 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Clinical classification (CCSR)

MS-DRG Grouper

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2027
  • DRG 791 — PREMATURITY WITH MAJOR PROBLEMS[MS-DRG]: “PREMATURITY WITH MAJOR PROBLEMS (MDC 15)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
  • DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS[MS-DRG]: “FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2027

MDC crossing

Index entries

  • Infection, infected, infective (opportunistic), congenital, urinary (tract)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Infection, infected, infective (opportunistic), urinary (tract), newborn[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Newborn (infant) (liveborn) (singleton), infection, urinary tract[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Indexed Clinical Terms (3)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "P39.3 — Neonatal urinary tract infection." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/p39.3-neonatal-urinary-tract-infection

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Neonatal urinary tract infection

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to P39.3 in its code family, with their registry titles.

View all codes in the P39 family