Q43.6 vs Q64.73
Q43.6 (Congenital fistula of rectum and anus) compared with Q64.73 (Congenital urethrorectal fistula), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Q43.6 carries an Excludes1 note covering Q64.73: “congenital urethrorectal fistula (Q64.73)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| Q43.6Congenital fistula of rectum and anus | Q64.73Congenital urethrorectal fistula | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Congenital fistula of rectum and anus is a billable ICD-10-CM diagnosis code (Q43.6). | Congenital urethrorectal fistula is a billable ICD-10-CM diagnosis code (Q64.73). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources