Product-type market taxonomy bifurc into metal and plastic, each carrying distinct clinical-economic trade-offs. Metal stents captured 68 % of 2023 global sales; within this, self-expanding uncovered variants claim 42 % owing to higher patency (>6 months) in malignancy, whereas fully-covered models, 20 %, mitigate epithelial hyperplasia for benign strictures yet require secondary ERCP for removal. Drug-eluting metal, 6 %, is nascent but growing at 14 % CAGR as early data show doubled patency versus bare metal in distal malignant obstructions. Plastic stents hold the remaining 32 %; double-pigtail polyethylene, 19 %, remains the workhorse for short-term drainage because unit cost is <5 % of metal, while straight plastic with side-holes, 13 %, is preferred for tandem deployment in hilar strictures. Overall, Digestive System Biliary Stent segmentation by type is shifting toward metal platforms as value-based procurement rewards fewer re-interventions despite higher index pricing.