Question: How should I code a biopsy of a recto-vaginal fistula? Answer: You should code a rectovaginal fistula as 619.1 (Digestive-genital tract fistula, female). You won't find any specific CPT for the biopsy of the fistula, so you may have to opt for a vaginal biopsy (57100-57105 as being the closest, or a biopsy of the rectum (45100, Biopsy of anorectal wall, anal approach [e.g., congenital megacolon]). Read the op report to see a description of the site of the biopsy so you get more information.
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