| Code | Title | 
					
				| – | Top Categories | 
		
					
				| 0 | Medical and Surgical | 
					
				| 0W | Anatomical Regions, General | 
					
				| 0W9 | Drainage
					Anatomical Regions, General, Drainage | 
					
				| 0W9H | Retroperitoneum | 
					
				| 0W9H0 | Open | 
					
				| 0W9H00 | Drainage Device | 
					
				| 0W9H00Z | No Qualifier
					Drainage of Retroperitoneum with Drainage Device, Open Approach | 
					
				| 0W9H0Z | No Device | 
					
				| 0W9H0ZX | Diagnostic
					Drainage of Retroperitoneum, Open Approach, Diagnostic | 
					
				| 0W9H0ZZ | No Qualifier
					Drainage of Retroperitoneum, Open Approach | 
					
				| 0W9H3 | Percutaneous | 
					
				| 0W9H30 | Drainage Device | 
					
				| 0W9H30Z | No Qualifier
					Drainage of Retroperitoneum with Drainage Device, Percutaneous Approach | 
					
				| 0W9H3Z | No Device | 
					
				| 0W9H3ZX | Diagnostic
					Drainage of Retroperitoneum, Percutaneous Approach, Diagnostic | 
					
				| 0W9H3ZZ | No Qualifier
					Drainage of Retroperitoneum, Percutaneous Approach | 
					
				| 0W9H4 | Percutaneous Endoscopic | 
					
				| 0W9H40 | Drainage Device | 
					
				| 0W9H40Z | No Qualifier
					Drainage of Retroperitoneum with Drainage Device, Percutaneous Endoscopic Approach | 
					
				| 0W9H4Z | No Device | 
					
				| 0W9H4ZX | Diagnostic
					Drainage of Retroperitoneum, Percutaneous Endoscopic Approach, Diagnostic | 
					
				| 0W9H4ZZ | No Qualifier
					Drainage of Retroperitoneum, Percutaneous Endoscopic Approach |