Table 1.

Procedure and disease codes used for the estimation of bariatric surgery volume

Country	Procedure codes	Diagnosis codes	DRG codes
Belgium	–	–	APR DRG 403
France	HFFA011, HFFC018, HFCC003, HFCA001, HFMA009, HFMC007, HFKA002, HFKC001	–	–
Germany	5–434.50, 5–434.51, 5–434.52, 5–436.11, 5–445.01, 5–445.02, 5–445.10, 5–445.11, 5–445.12, 5–445.20, 5–445.21, 5–445.22, 5–445.40, 5–445.41, 5–445.42, 5–445.50, 5–445.51, 5–445.52, 5–445.×1, 5–445.x2, 5–445.×3, 5–448.b0, 5–448.b1, 5–448.b2, 5–448.bx, 5–448.c0, 5–448.c1, 5–448.c2, 5–448.c3, 5–448.cx	E66, E66.0, E66.1, E66.2, E66.8, E66.9	–
England	G28.1, G28.2, G28.3, G28.4, G28.5, G28.8, G28.9, G30.1, G30.2, G30.3, G31.0, G31.1, G31.2, G31.4, G31.6, G31.8, G31.9, G32.0, G32.1, G32.3, G32.4, G32.5, G32.8, G32.9, G33.0, G33.1, G33.3, G33.5, G33.6, G33.8, G33.9, G5.11	E66	–