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"Right biliary system: The indwelling biliary drain was exchanged over a wire for a sheath through which contrast injection was performed. A guidewire was passed through the bile ducts and into the small bowel, and a biliary stent was deployed. An external biliary drain was placed, and final contrast injection was performed. Initial cholangiogram findings: Severe segmental distal CBD stenosis causing intra and extrahepatic biliary dilation. Stent(s) placed: 6 x 80 mm. Stent type: Uncovered. Stent position: Common bile duct. Balloon dilation of stent (mm): 8. Following this, repeat cholangiogram was performed through the sheath. This demonstrated mild delay of contrast passage into the duodenum distal to the inferior terminus of the newly placed CBD stent. The distal CBD inferior to the stent was then subsequently treated with cholangioplasty using an 8 x 40 mm balloon. Completion sheath cholangiogram demonstrated widely patent common bile duct stent with passage of bile into the duodenum. Subsequently a safety external biliary drain was placed." Should we add code 47542?