2027 ICD-10-CM Diagnosis Code N32.1Vesicointestinal fistula
ICD-10-CM Codes›N00–N99›N30-N39›N32
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
N32.1 is a billable ICD-10-CM diagnosis code for vesicointestinal fistula. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700, 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 26 closely related codes. 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
Code Classification
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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N32.1: its own notes plus those printed at N32, block N30-N39, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Vesicorectal fistula
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.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N32.1, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming N32.1: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
colovesical N32.1
enterovesical N32.1
ileovesical N32.1
intestinovesical N32.1
rectovesical N32.1
to bladder N32.1
vesicocolic N32.1
vesicoenteric N32.1
vesicointestinal N32.1
vesicorectal N32.1
vesicosigmoidal N32.1
vesicourethrorectal N32.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Code HistoryHistory
Questions About N32.1Overview
What is the ICD-10 code for vesicointestinal fistula?
The ICD-10-CM code for vesicointestinal fistula is N32.1 (sometimes written as N321). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
What MS-DRG does N32.1 group to?
When vesicointestinal fistula is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 699, 698, 700, with relative weights from 0.6740 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is N32.1 a CC or MCC?
CMS lists N32.1 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 26 closely related codes in its exclusion list.
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.
