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ICD-9 code Periampullary diverticulum


Question

What is the proper way to code a periampullary diverticulum found on an ERCP?

Answer

A periampullary diverticulum is defined as a diverticulum found on either side of the ampulla of vater, specifically within  2-3 cm of the ampulla of vater.  The ampulla of vater is located at the halfway point of the 2nd part of the duodenum and represents the point where the common bile duct and pancreatic bile duct merge together and enter the duodenum.  Because of the location of the ampulla of vater, and a code that is not specific to this area, a code for a diveriticulum of the duodendum is recommended 562.00.

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