| Service | Number of cases | OPS key | Info | 
																			
											| Surgical removal or reconstruction of the nasal septum | 92 | 5-214.6 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | 79 | 5-285.0 |  | 
																			
											| Operation on the inferior nasal concha | 77 | 5-215.3 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 73 | 5-281.5 |  | 
																			
											| Operation on the inferior nasal concha | 40 | 5-215.4 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | 36 | 5-200.5 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | 28 | 5-200.4 |  | 
																			
											| Operation on the inferior nasal concha | 25 | 5-215.1 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | 23 | 5-222.20 |  | 
																			
											| Operation on several paranasal sinuses | 23 | 5-224.63 |  | 
																			
											| Operation using aids for optical magnification, e.g. magnifying spectacles, operating microscope | 20 | 5-984 |  | 
																			
											| Revision operations | 19 | 5-983 |  | 
																			
											| Operation on the inferior nasal concha | 17 | 5-215.00 |  | 
																			
											| Use of shaver technology for soft tissue and bone removal during surgery to the nose, paranasal sinuses and facial skull bones | 16 | 5-98f |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 15 | 5-281.0 |  | 
																			
											| Surgical removal or reconstruction of the nasal septum | 13 | 5-214.5 |  | 
																			
											| Operation on the maxillary sinuses | 13 | 5-221.1 |  | 
																			
											| Surgical construction or reconstructive operation on the external auditory canal | 11 | 5-185.0 |  | 
																			
											| Operation on the maxillary sinuses | 11 | 5-221.6 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) (type I) | 7 | 5-194.0 |  | 
																			
											| Surgical reduction of a broken nose | 6 | 5-216.0 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | 5 | 5-222.0 |  | 
																			
											| Corrective surgery on the internal or external nose | 4 | 5-218.2x |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | 4 | 5-285.1 |  | 
																			
											| Treatment of a nose bleed by packing with absorbent material (tamponade) | 4 | 8-500 |  | 
																			
											| Taking a tissue sample (biopsy) of the larynx without surgical incision | not specified | 1-421.0 |  | 
																			
											| Examination of the larynx by endoscopy | not specified | 1-610.0 |  | 
																			
											| Examination of the trachea and the bronchi by endoscopy | not specified | 1-620.10 |  | 
																			
											| Examination of the trachea or bronchi by endoscopy, through a surgical incision, or during an operation | not specified | 1-690.1 |  | 
																			
											| Operation on the corner of the eye or eyelid crease | not specified | 5-092.3 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the outer ear | not specified | 5-181.7 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the outer ear | not specified | 5-181.9 |  | 
																			
											| Surgical construction or reconstructive operation on the external auditory canal | not specified | 5-185.2 |  | 
																			
											| Surgical construction or reconstructive operation on the external auditory canal | not specified | 5-185.x |  | 
																			
											| Other operations on the ossicles (small bones) of the ear | not specified | 5-193 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | not specified | 5-195.90 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | not specified | 5-195.b0 |  | 
																			
											| Other microscopic surgery on the middle ear using equipment for optical magnification | not specified | 5-199 |  | 
																			
											| Removal of a grommet from the Eustachian tube | not specified | 5-201 |  | 
																			
											| Surgical incision into the mastoid process or the middle ear | not specified | 5-202.0 |  | 
																			
											| Surgical clearance of the mastoid process | not specified | 5-203.1 |  | 
																			
											| Reconstructive operations on the middle ear | not specified | 5-204.3 |  | 
																			
											| Other surgical removal from the middle or inner ear | not specified | 5-205.0 |  | 
																			
											| Surgical treatment of nosebleeds | not specified | 5-210.1 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.3 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.40 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.41 |  | 
																			
											| Operation on the inferior nasal concha | not specified | 5-215.2 |  | 
																			
											| Surgical reduction of a broken nose | not specified | 5-216.1 |  | 
																			
											| Corrective surgery on the external nose | not specified | 5-217.1 |  | 
																			
											| Corrective surgery on the internal or external nose | not specified | 5-218.00 |  | 
																			
											| Corrective surgery on the internal or external nose | not specified | 5-218.0x |  | 
																			
											| Corrective surgery on the internal or external nose | not specified | 5-218.11 |  | 
																			
											| Corrective surgery on the internal or external nose | not specified | 5-218.20 |  | 
																			
											| Other operations on the nose | not specified | 5-219.x |  | 
																			
											| Operation on the maxillary sinuses | not specified | 5-221.0 |  | 
																			
											| Operation on the maxillary sinuses | not specified | 5-221.4 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | not specified | 5-222.21 |  | 
																			
											| Operation on the frontal sinuses | not specified | 5-223.2 |  | 
																			
											| Operation on the frontal sinuses | not specified | 5-223.5 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.4 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.61 |  | 
																			
											| Other operations on the paranasal sinuses | not specified | 5-229 |  | 
																			
											| Other operations on the tongue | not specified | 5-259.1 |  | 
																			
											| Surgical incision or opening of a salivary gland or a salivary duct, e.g. to remove a salivary stone (calculus) | not specified | 5-260.10 |  | 
																			
											| Surgical incision or opening of a salivary gland or a salivary duct, e.g. to remove a salivary stone (calculus) | not specified | 5-260.21 |  | 
																			
											| Surgical removal of a salivary gland | not specified | 5-262.04 |  | 
																			
											| Surgical removal of a salivary gland | not specified | 5-262.41 |  | 
																			
											| Surgical incision and drainage of fluid from the mouth, jaw or facial region | not specified | 5-270.8 |  | 
																			
											| Surgical opening or drainage, from the oral cavity, of a pus-filled abscess in the throat | not specified | 5-280.0 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | not specified | 5-281.4 |  | 
																			
											| Other operations on the tonsils or adenoids | not specified | 5-289.1 |  | 
																			
											| Operation on usually fluid-filled cavities in the neck, which have not completely closed since birth (remnants of the branchial cleft) | not specified | 5-291.1 |  | 
																			
											| Other reconstructive operations on the throat (pharynx) | not specified | 5-294.4 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the larynx | not specified | 5-300.1 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the larynx | not specified | 5-300.2 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the larynx | not specified | 5-300.30 |  | 
																			
											| Complete, surgical removal of all the lymph nodes in the neck - neck dissection | not specified | 5-403.00 |  | 
																			
											| Removal of a foreign body without a surgical incision | not specified | 8-101.4 |  | 
																			
											| Dressings for large areas of skin or serious skin diseases | not specified | 8-191.00 |  | 
																			
											| Exchange or removal of the absorbent pack used to stop bleeding (tamponade) | not specified | 8-506 |  | 
																			
											| Monitoring of various functions of the nervous system during an operation | not specified | 8-925.00 |  | 
																			
											|  | not specified | 9-984.7 |  |