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N39.0 ICD-10-CM Code: Urinary tract infection, site not specified

Compare with another codeCheck this code on a claim

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

Coding at a Glance

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 (B95-B97), to identify infectious agent.
Excludes1Never report 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:

+3 more in Instructions

Excludes2Not included here; may be reported together
  • hematuria NOS (R31.-)
  • recurrent or persistent hematuria (N02.-)
  • recurrent or persistent hematuria with specified morphological lesion (N02.-)
  • proteinuria NOS (R80.-)

+3 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 689 — KIDNEY AND URINARY TRACT INFECTIONS WITH MCC (MDC 11)
  • MS-DRG 690 — KIDNEY AND URINARY TRACT INFECTIONS WITHOUT MCC (MDC 11)
  • 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 N39.0 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 N39.0 itself; “inherited from” names the category or block whose note applies here.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

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 (B95-B97), to identify infectious agent.

Coder workflow for N39.0

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

Before you code N39.0

  1. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with N39.0. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in N39.0’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewB37.4, P39.3, R82.81, N30, N13.6, N34

Consider N39.0. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

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

  • Excludes1 — check before selecting N39.0(7 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with N39.0: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareB37.4, P39.3, R82.81, N30, N13.6, N34

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

  • Excludes2 — not part of N39.0(7 notes)

    Coding workflow: The conditions named in this note are not included in N39.0. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareR31, N02, R80, O08.8, O23, O75.3

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

  • Use Additional Code — after identifying N39.0(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with N39.0 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

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.

Before you code N39.0

MedCoder editorial — not official ICD-10-CM text; reviewed against the cited source

This checklist routes you to the categories to review — it does not determine the final code.

N39.0 asserts one specific thing: a urinary tract infection whose site the record does not name. Its Excludes1 list is a routing table — a documented site, a fungal organism, or a neonatal patient each select a different code. Check for these before settling on N39.0.

  • Bladder infection documented (cystitis) → N30.- Cystitis

    N39.0’s Excludes1 names the specified-site codes — a documented site makes the site code the correct one, not an addition.

  • Urethra documented as the site → N34.- Urethritis and urethral syndrome

    Same Excludes1 routing — urethritis is a specified site.

  • Kidney involvement documented (pyelonephritis, pyonephrosis) → N10 Acute pyelonephritis

    Once the provider documents the infection at a specific site, N39.0 may no longer describe the condition — review the documented site and the code for it; pyonephrosis has its own row at N13.6.

  • Candidal (fungal) urinary tract infection documented → B37.4- Candidiasis of urogenital sites

    Candidiasis of the urinary tract is an N39.0 Excludes1 — the mycosis chapter claims it.

  • Newborn patient → P39.3 Neonatal urinary tract infection

    The perinatal chapter’s code takes over by Excludes1.

  • Pyuria documented without a diagnosed infection → R82.81 Pyuria

    Pyuria alone does not establish a UTI. Where the provider documents only pyuria and no diagnosis of urinary tract infection, review R82.81 rather than assigning N39.0 from the laboratory finding alone — pyuria is an N39.0 Excludes1, routed to the findings chapter.

  • Organism identified and associated with the infection → a B95-B97 code, as an additional code

    The Use Additional Code note asks for the infectious agent alongside N39.0 — it accompanies the code rather than replacing it.

The pyuria row is the same documentation boundary that separates findings from diagnoses across the classification. Symptom code vs confirmed diagnosis →

Provider documentation and the ICD-10-CM Official Guidelines control; verify against the official tabular notes on this page.

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

Urinary tract infection, site not specified is a billable ICD-10-CM diagnosis code (N39.0).

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

Coding Notes

MedCoder editorial — not official ICD-10-CM text; reviewed against the cited source

What this code means

N39.0 reports a urinary tract infection whose site the record does not specify. The title is the boundary: the moment a site is documented — bladder, urethra, kidney — the classification’s Excludes1 note (“urinary tract infection of specified site, such as: cystitis (N30.-), urethritis (N34.-)”) makes the site-specific code the correct one, not an addition.

Coding guidance

  • The organism gets its own code: the Use Additional Code note asks for B95–B97 to identify the infectious agent. A positive culture result does not by itself establish the relationship — the additional code follows when the documentation associates the organism with the infection.
  • Pyelonephritis is a specified site — once the record places the infection, N39.0’s “site not specified” no longer describes the documented condition, and the site-specific code is the one to review.
  • Pregnancy changes the lead code: urinary infection complicating pregnancy, childbirth and the puerperium is a block-level Excludes2 on N30–N39 pointing to O23.-, O75.3 and O86.2- — the obstetric code leads the encounter, and as an Excludes2 relationship N39.0 may still be reported alongside it.
  • Pyuria alone does not establish a UTI. It is a laboratory finding with its own Excludes1 destination (R82.81); where the provider documents pyuria without a diagnosis of urinary tract infection, R82.81 is the code to review. Laboratory findings still inform the clinical picture — what they do not do is substitute for the provider’s diagnostic statement.

Decision-rule scenarios

Documentation: The record documents “UTI” and a urine culture growing a named organism.

Coding question: How is the organism captured?

Rule: With a B95–B97 additional code after N39.0, per the code’s Use Additional Code note — the deciding element is whether the provider links the organism to the infection.

Documentation: The provider documents “UTI — likely cystitis.”

Coding question: Does N39.0 stand?

Rule: The documented site and the setting both matter. A stated site selects the site-specific family under the Excludes1 note. The “likely” qualifier follows the setting rules: on an inpatient discharge, an uncertain diagnosis is coded as if established (Guidelines Section II.H); the outpatient guidelines state the inconclusive-diagnosis rules do not apply there, so the encounter is coded to what is known. The deciding elements are the site statement and the encounter setting.

Scenarios state the decision rule, not a code assignment — code selection always follows the provider's documentation and the ICD-10-CM Official Guidelines.

Documentation checklist

  • The site, or its genuine absence — the entire N39.0 boundary.
  • The organism, for the B95–B97 additional code.
  • Pregnancy status, which moves the infection to Chapter 15 codes.

Codes are assigned from provider documentation; a coder never infers a diagnosis.

Common mistakes

  • Adding N39.0 beside a cystitis or pyelonephritis code — the Excludes1 makes them alternatives, not companions.
  • Dropping the organism code when the culture result is linked by the provider.
  • Coding N39.0 from a urinalysis finding alone — pyuria is R82.81 until a UTI is documented.

Clinical context (coding perspective)

Most of the coding work on a chart that says “UTI” is negative: confirming the record really does NOT name a site or an organism before settling on the unspecified code.

Written and reviewed by MedCoder against the official ICD-10-CM files; educational, not medical or billing advice. The official tabular notes and guidelines above take precedence in every case.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 7 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  3. 7 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

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 N39.0 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 3 Excludes1 notes across 2 chapters: N15.9 — Renal tubulo-interstitial disease, unspecified, R32 — Unspecified urinary incontinence (via N39.-), R39.81 — Functional urinary incontinence (via N39.-).

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

Referenced by 2 Use Additional Code instructions across 2 chapters: G90.4 — Autonomic dysreflexia, N31 — Neuromuscular dysfunction of bladder, not elsewhere classified (via N39.-).

These codes instruct coders to additionally report this code when it applies.

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 75 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 4 MS-DRGs: DRG 689 (MDC 11), DRG 690 (MDC 11), 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):GEN004 — Urinary tract 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.

N30.80 — Other cystitis without hematuria, N30.81 — Other cystitis with hematuria, N30.90 — Cystitis, unspecified without hematuria, N30.91 — Cystitis, unspecified with hematuria, N34.1 — Nonspecific urethritis, N36.41 — Hypermobility of urethra, N36.42 — Intrinsic sphincter deficiency (ISD), N36.43 — Combined hypermobility of urethra and intrinsic sphincter deficiency, N36.8 — Other specified disorders of urethra, N36.9 — Urethral disorder, unspecified, N39.8 — Other specified disorders of urinary system, N39.9 — Disorder of urinary system, unspecified, N80.A0 — Endometriosis of bladder, unspecified depth, N80.A1 — Superficial endometriosis of bladder, N80.A2 — Deep endometriosis of bladder, N80.A41 — Superficial endometriosis of right ureter, 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, +54 more

Same clinical category (CCSR)

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

N30.40 — Irradiation cystitis without hematuria, N30.41 — Irradiation cystitis with hematuria, N30.80 — Other cystitis without hematuria, N30.81 — Other cystitis with hematuria, N30.90 — Cystitis, unspecified without hematuria, N30.91 — Cystitis, unspecified with hematuria, N34.0 — Urethral abscess, N34.1 — Nonspecific urethritis, N34.2 — Other urethritis, N34.3 — Urethral syndrome, unspecified, O23.00 — Infections of kidney in pregnancy, unspecified trimester, O23.01 — Infections of kidney in pregnancy, first trimester, O23.02 — Infections of kidney in pregnancy, second trimester, O23.03 — Infections of kidney in pregnancy, third trimester, O23.10 — Infections of bladder in pregnancy, unspecified trimester, O23.11 — Infections of bladder in pregnancy, first trimester, O23.12 — Infections of bladder in pregnancy, second trimester, O23.13 — Infections of bladder in pregnancy, third trimester, O23.20 — Infections of urethra in pregnancy, unspecified trimester, O23.21 — Infections of urethra in pregnancy, first trimester, +40 more

Same Index main term, other category

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

F45.8 — Other somatoform disorders (retention or stasis, psychogenic), F98.0 — Enuresis not due to a substance or known physiological condition (enuresis, nonorganic origin), R19.5 — Other fecal abnormalities (in, stool), R32 — Unspecified urinary incontinence (incontinence), R33.0 — Drug induced retention of urine (retention or stasis, organic, drug-induced), R33.8 — Other retention of urine (retention or stasis, organic), R33.9 — Retention of urine, unspecified (retention or stasis), R34 — Anuria and oliguria (secretion, deficient), R35.0 — Frequency of micturition (frequency), R35.89 — Other polyuria (secretion, excessive), R39.0 — Extravasation of urine (extravasation), R39.12 — Poor urinary stream (stream, weak), R39.13 — Splitting of urinary stream (stream, splitting), R39.198 — Other difficulties with micturition (stream, slowing)

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Blood Glucose Test

Contextual Map

Every relationship of N39.0 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 N39.0 with these 14 related codes in Claim Check

Hierarchy

Excludes1

Use Additional Code

Referenced by Excludes1 notes

Referenced by Use Additional Code instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 11 — Diseases and Disorders of the Kidney and Urinary Tract[MDC crossing]: “Diseases and Disorders of the Kidney and Urinary Tract — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 3,578 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027
  • MDC 15 — Newborns and Other Neonates with Conditions Originating in Perinatal Period[MDC crossing]: “Newborns and Other Neonates with Conditions Originating in Perinatal Period — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2027

Index entries

  • Infection, infected, infective (opportunistic), urinary (tract)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Pus, in, urine[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Urine, pus in[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (16)

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.

Common coding questions

MedCoder editorial

When is N39.0 not the right UTI code?

When the site is specified — the Excludes1 note routes cystitis to N30.-, urethritis to N34.- and pyonephrosis to N13.6. N39.0 is site-not-specified by title; a documented site makes the specific code the correct one.

What organism code goes with N39.0?

N39.0 carries a Use Additional Code note for a B95–B97 code to identify the infectious agent. A culture result alone does not settle it — the organism code follows when the documentation associates the organism with the infection. How the three note types divide the work is in Code First, Use Additional Code, and Code Also.

Is N39.0 used for a UTI in pregnancy?

The obstetric code leads: “urinary infection (complicating) pregnancy, childbirth and the puerperium” is a block-level Excludes2 on N30–N39 pointing to O23.-, O75.3 and O86.2-, so the Chapter 15 code is sequenced first for those encounters — and, as an Excludes2 relationship, N39.0 may still be reported alongside it.

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, coding notes, decision checklist 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 20, 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. "N39.0 — Urinary tract infection, site not specified." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/n39.0-urinary-tract-infection-site-not-specified

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Urinary tract infection, site not specified

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 N39.0 in its code family, with their registry titles.

View all codes in the N39 family