| Service | Number of cases | OPS key | Info | 
																			
											| Surgical removal or reconstruction of the nasal septum | 31 | 5-214.70 |  | 
																			
											| Operation on the inferior nasal concha | 31 | 5-215.1 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | 30 | 5-285.0 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | 19 | 5-200.5 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 19 | 5-281.0 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 18 | 5-281.5 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | 8 | 5-200.4 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the larynx | 7 | 5-300.2 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | 5 | 5-222.21 |  | 
																			
											| Corrective surgery on the internal or external nose | 4 | 5-218.10 |  | 
																			
											| Operation on the maxillary sinuses | 4 | 5-221.6 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | 4 | 5-285.x |  | 
																			
											| Any other endoscopy through a stab incision, surgical opening or during an operation | not specified | 1-699.0 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the outer ear | not specified | 5-181.0 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the outer ear | not specified | 5-181.3 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.20 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.x |  | 
																			
											| Surgical removal or destruction of diseased tissue in the nose | not specified | 5-212.0 |  | 
																			
											| Corrective surgery on the internal or external nose | not specified | 5-218.20 |  | 
																			
											| Operation on the maxillary sinuses | not specified | 5-221.1 |  | 
																			
											| Operation on the maxillary sinuses | not specified | 5-221.4 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | not specified | 5-222.20 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.3 |  | 
																			
											| Other operations on the tongue | not specified | 5-259.1 |  | 
																			
											| Surgical removal of a salivary gland | not specified | 5-262.41 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | not specified | 5-285.1 |  | 
																			
											| Other reconstructive operations on the throat (pharynx) | not specified | 5-294.4 |  | 
																			
											| Surgical incision into the larynx or other incisions into the trachea | not specified | 5-313.2 |  | 
																			
											| Surgical removal of individual lymph nodes or lymphatic vessels | not specified | 5-401.00 |  | 
																			
											| Surgical removal of individual lymph nodes or lymphatic vessels | not specified | 5-401.0x |  | 
																			
											| Operation using aids for optical magnification, e.g. magnifying spectacles, operating microscope | not specified | 5-984 |  | 
																			
											| Treatment by injecting a medicine into an organ or tissue, or removal of excess fluid (effusion) e.g. from the joints | not specified | 8-020.x |  | 
																			
											| Removal of a foreign body by endoscopy | not specified | 8-100.1 |  | 
																			
											| Treatment of a nose bleed by packing with absorbent material (tamponade) | not specified | 8-500 |  | 
																			
											|  | not specified | 9-984.7 |  | 
																			
											|  | not specified | 9-984.8 |  | 
																			
											|  | not specified | 9-984.b |  |