CPT® Code 46716

An imperforate anus is a congenital condition characterized by the absence of a proper anal opening, which can manifest in two primary forms: a complete lack of an anal opening or the presence of a small, misplaced fistulous tract. The term "low imperforate anus" is considered outdated; however, it generally refers to a malformation located at or below the levator ani muscles. In contemporary medical practice, anorectal malformations are classified based on their anatomical features. An anoperineal fistula, which can occur in both males and females, is a condition where the anus is closed, but there exists an opening in the perineal body. In males, this may present as a fistula extending into the scrotum, often accompanied by mucus or meconium found in the scrotal tissues. Conversely, an anovestibular fistula is specific to females and is identified as a small opening located in the posterior vestibule of the vagina. The procedure associated with CPT® Code 46716 addresses the repair of a low imperforate anus characterized by either an anoperineal or anovestibular fistula through a surgical technique known as transposition anoplasty. This procedure aims to create a functional anal opening by repositioning the fistula into the anal sphincter, thereby facilitating normal bowel function and preventing complications such as bowel obstruction and colon hypertrophy.