ICD-10-CM 2027
ICD-10 code for Rectourethral fistula
From the official ICD-10-CM alphabetic index entry “Fistula (cutaneous) › rectourethral”. Page updated September 29, 2026.
About coding Rectourethral fistula
The ICD-10-CM code for Rectourethral fistula is N36.0 (Urethral fistula). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on N36.0.
Within N36 (other disorders of urethra), N36.0 is specifically for urethral fistula. Related codes cover urethral diverticulum (N36.1), urethral caruncle (N36.2), urethral functional and muscular disorders (N36.4), urethral false passage (N36.5), other specified disorders of urethra (N36.8) and urethral disorder, unspecified (N36.9).
Don't report N36.0 together with the conditions in its Excludes1 note: urethroscrotal fistula (N50.89), urethrovaginal fistula (N82.1) and urethrovesicovaginal fistula (N82.1).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific Rectourethral fistula codes (official index)
- congenital Q64.73 — Congenital urethrorectal fistula
Don't confuse with (Excludes1 for N36.0)
Common questions about Rectourethral fistula ICD-10 codes
What is the ICD-10 code for Rectourethral fistula?
- N36.0 — Urethral fistula. More specific codes apply when the documentation supports them: Q64.73.
What is the ICD-10 code for congenital rectourethral fistula?
- Q64.73 — Congenital urethrorectal fistula.
Is N36.0 billable?
- Yes. N36.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N36.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N36.0 as a principal diagnosis.
Is N36.0 a CC or MCC?
- N36.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.