| Service | Number of cases | OPS key | Info | 
																			
											| Operation on the inferior nasal concha | 72 | 5-215.3 |  | 
																			
											| Surgical removal or reconstruction of the nasal septum | 58 | 5-214.70 |  | 
																			
											| Operation using aids for optical magnification, e.g. magnifying spectacles, operating microscope | 35 | 5-984 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | 17 | 5-285.0 |  | 
																			
											| Other operations on the outer ear | 15 | 5-189.0 |  | 
																			
											| Operation on several paranasal sinuses | 15 | 5-224.63 |  | 
																			
											| Surgical construction or reconstructive operation on the external auditory canal | 12 | 5-185.0 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 12 | 5-281.5 |  | 
																			
											| Surgical removal of the tonsils and adenoids | 12 | 5-282.0 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | 11 | 5-281.0 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | 10 | 5-200.5 |  | 
																			
											| Operation using lasers | 9 | 5-985.2 |  | 
																			
											| Revision operations | 8 | 5-983 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | 7 | 5-195.a0 |  | 
																			
											| Surgical removal of the tonsils and adenoids | 7 | 5-282.1 |  | 
																			
											| Reconstructive operations on the middle ear | 6 | 5-204.2 |  | 
																			
											| Operation on several paranasal sinuses | 6 | 5-224.62 |  | 
																			
											| Other treatment by the targeted insertion of a needle with subsequent administration or removal of substances, e.g. fluid | 6 | 8-159.x |  | 
																			
											| Surgical removal of individual lymph nodes or lymphatic vessels | 5 | 5-401.00 |  | 
																			
											| Computed tomography of the neck with contrast medium | 4 | 3-221 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | 4 | 5-195.b2 |  | 
																			
											| Operation on the maxillary sinuses | 4 | 5-221.6 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | 4 | 5-222.20 |  | 
																			
											| Surgical removal of a salivary gland | 4 | 5-262.40 |  | 
																			
											| Taking a tissue sample (biopsy) of muscle or soft tissue through a surgical incision | not specified | 1-502.0 |  | 
																			
											| Examination of the larynx by endoscopy | not specified | 1-610.0 |  | 
																			
											| Other examination by taking a sample of fluid or tissue with a needle | not specified | 1-859.x |  | 
																			
											| Computed tomography (CT) of the head without contrast medium | not specified | 3-200 |  | 
																			
											| Computed tomography of the chest with contrast medium | not specified | 3-222 |  | 
																			
											| Surgical removal of a residual connection between the thyroid gland and tongue after birth | not specified | 5-065.1 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the outer ear | not specified | 5-181.1 |  | 
																			
											| 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.a1 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | not specified | 5-195.a2 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | not specified | 5-195.b0 |  | 
																			
											| Surgical closure of the eardrum (tympanic membrane) or reconstructive operations on the ossicles (small bones) of the ear | not specified | 5-195.b1 |  | 
																			
											| Surgical incision into the eardrum (tympanic membrane) | not specified | 5-200.4 |  | 
																			
											| Removal of a grommet from the Eustachian tube | not specified | 5-201 |  | 
																			
											| Surgical incision into the mastoid process or the middle ear | not specified | 5-202.5 |  | 
																			
											| Surgical clearance of the mastoid process | not specified | 5-203.0 |  | 
																			
											| Surgical clearance of the mastoid process | not specified | 5-203.1 |  | 
																			
											| Surgical clearance of the mastoid process | not specified | 5-203.70 |  | 
																			
											| Surgical clearance of the mastoid process | not specified | 5-203.x |  | 
																			
											| Reconstructive operations on the middle ear | not specified | 5-204.0 |  | 
																			
											| Reconstructive operations on the middle ear | not specified | 5-204.1 |  | 
																			
											| Reconstructive operations on the middle ear | not specified | 5-204.3 |  | 
																			
											| Surgical treatment of nosebleeds | not specified | 5-210.1 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.11 |  | 
																			
											| Surgical incision into the nose | not specified | 5-211.40 |  | 
																			
											| Surgical removal or reconstruction of the nasal septum | not specified | 5-214.0 |  | 
																			
											| Surgical removal or reconstruction of the nasal septum | not specified | 5-214.6 |  | 
																			
											| Operation on the inferior nasal concha | not specified | 5-215.4 |  | 
																			
											| Surgical reduction of a broken nose | not specified | 5-216.0 |  | 
																			
											| Surgical reduction of a broken nose | not specified | 5-216.1 |  | 
																			
											| Corrective surgery on the external nose | not specified | 5-217.0 |  | 
																			
											| 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 | 5-222.0 |  | 
																			
											| Operation on the ethmoid bone or on the sphenoid sinus | not specified | 5-222.21 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.0 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.3 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.4 |  | 
																			
											| Operation on several paranasal sinuses | not specified | 5-224.6x |  | 
																			
											| Surgical removal of a salivary gland | not specified | 5-262.04 |  | 
																			
											| Surgical removal of a salivary gland | not specified | 5-262.05 |  | 
																			
											| Surgical incision and drainage of fluid from the mouth, jaw or facial region | not specified | 5-270.6 |  | 
																			
											| Surgical incision into the hard or soft palate | not specified | 5-271.0 |  | 
																			
											| Surgical removal or destruction of the (diseased) hard or soft palate | not specified | 5-272.1 |  | 
																			
											| Corrective surgery on the hard palate - palatoplasty | not specified | 5-275.8 |  | 
																			
											| Other operations on the mouth | not specified | 5-279.0 |  | 
																			
											| Surgical removal of the palatine tonsils (without removal of the adenoids) - tonsillectomy without adenoidectomy | not specified | 5-281.1 |  | 
																			
											| Surgical removal of the (enlarged) adenoids (without removal of the tonsils) | not specified | 5-285.1 |  | 
																			
											| Other operations on the tonsils or adenoids | not specified | 5-289.00 |  | 
																			
											| 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 | 5-300.2 |  | 
																			
											| Clearance of several lymph nodes from a region [as a standalone operation] | not specified | 5-402.0 |  | 
																			
											| Extensive surgical removal of diseased tissue from the skin or subcutaneous tissues | not specified | 5-895.14 |  | 
																			
											| Free skin flap grafting [site of removal and nature of the graft] | not specified | 5-902.64 |  | 
																			
											| Treatment of a nose bleed by packing with absorbent material (tamponade) | not specified | 8-500 |  | 
																			
											| Exchange or removal of the absorbent pack used to stop bleeding (tamponade) | not specified | 8-506 |  | 
																			
											| Transfusion of blood, red blood cells or platelets from a donor to a recipient | not specified | 8-800.c0 |  | 
																			
											|  | not specified | 9-984.6 |  | 
																			
											|  | not specified | 9-984.7 |  |