2026 ICD-10-CM Diagnosis Code N32.1Vesicointestinal fistula

ICD-10-CM Codes›N00–N99›N30-N39›N32

ICD-10-CM N32.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N32.1 is a billable ICD-10-CM diagnosis code for vesicointestinal fistula. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. Coders also document this condition as fistula of sigmoid colon. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of bladder and urethra.

Code Identity

ICD-10-CM Code
N32.1
Billable Status
Yes — Valid for Submission
Code Describes
Vesicointestinal fistula
Short Description
Vesicointestinal fistula
Same as the full description in the CMS dataset.
Parent Code
N32
Other disorders of bladder

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN32Other disorders of bladder
This CodeN32.1Vesicointestinal fistula

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fistula of sigmoid colon
  • Ileovesical fistula
  • Intestinovesical fistula
  • Rectourinary fistula
  • Vesicocolic fistula
  • Vesicorectal fistula
  • Vesicosigmoidal fistula

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Vesicorectal fistula

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.

    • Fistula(cutaneous)
      • colovesical
    • Fistula(cutaneous)
      • enterovesical
    • Fistula(cutaneous)
      • ileovesical
    • Fistula(cutaneous)
      • intestinovesical
    • Fistula(cutaneous)
      • rectovesical
    • Fistula(cutaneous)
      • sigmoid
        • to bladder
    • Fistula(cutaneous)
      • vesicocolic
    • Fistula(cutaneous)
      • vesicoenteric
    • Fistula(cutaneous)
      • vesicointestinal
    • Fistula(cutaneous)
      • vesicorectal
    • Fistula(cutaneous)
      • vesicosigmoidal
    • Fistula(cutaneous)
      • vesicourethrorectal

Clinical ClassificationClinical

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

CCSR GEN007
Other specified and unspecified diseases of bladder and urethra
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Bladder Diseases

The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:

Read the full article at MedlinePlus

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

Convert N32.1 to ICD-9-CMHistory

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

ICD-9-CM
596.1 Intestinovesical fistula
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 N32.1Overview

Is N32.1 (Other disorders of bladder) a billable code?

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

What MS-DRG does N32.1 group to?

When vesicointestinal fistula is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N32.1?

Under the General Equivalence Mappings, vesicointestinal fistula converts to ICD-9-CM 596.1 (intestinovesical fistula). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.