Intraoperative choledochoscopy add-on guidance
ADD-ON CODE
Use +47550 when intraoperative choledochoscopy is actually performed and documented during the primary biliary operation.
Cholangiography is not the same as choledochoscopy. Do not use +47550 just because an intraoperative cholangiogram was performed.
CMS classifies +47550 as a Type II add-on code. Acceptable primary procedures may be contractor or payer defined.
Always confirm payer-specific policy, especially for facility packaging and MAC-specific primary procedure acceptance.
Source year: 2026 CMS Physician Fee Schedule add-on code framework. Last updated: April 24, 2026. Payment and pairing rules vary by payer, facility setting, and policy.
CPT +47550 captures true intraoperative choledochoscopy performed during a primary biliary operation. In plain English, it reflects direct scope evaluation of the bile duct during surgery, not just contrast imaging.
Do not report +47550 for a routine intraoperative cholangiogram alone. A cholangiogram is imaging, while choledochoscopy is actual endoscopic visualization of the duct. This add-on code also should not be billed by itself without an appropriate primary biliary procedure.
Document the primary biliary procedure, why choledochoscopy was performed, what the scope evaluation showed, and whether findings such as stones, debris, narrowing, or injury changed operative decision-making.
The biggest error is confusing cholangiography with choledochoscopy. Another common mistake is listing the add-on code without clearly tying it to the primary procedure and the separately documented scope-based work.
As an add-on code, +47550 is not billed alone and usually does not require separate modifier logic beyond the primary case context. The main issue is proving it was real endoscopic work and not bundled imaging.
Differentiate +47550 from codes where only cholangiography was performed, such as biliary operations with intraoperative imaging but no duct endoscopy. If the surgeon actually scoped the bile duct intraoperatively, that additional endoscopic work supports +47550.
This is useful for residents and fellows learning the difference between biliary imaging and true biliary endoscopy. It also matters for operative case understanding because the complexity can be under-recognized if the duct work is not documented clearly.
Educational coding support only. This page does not provide medical, legal, compliance, or reimbursement advice. Always verify CPT, CMS, NCCI, institutional, and payer-specific guidance before billing.
Author: Graydon Stallard, DO, FACOS, FACS