Background: Low transsphincteric fistulas less than 1/3 of the sphincter complex are easy to treat by fistulotomy with a high success rate. High transsphincteric fistulas remain a surgical challenge.
On the other hand, code 46280 was changed to better describe procedures included as “complex” treatment of an anal fistula, but “complex” has been replaced with the phrase “transsphincteric, ...
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