| Service | Number of cases | OPS key | Info | 
																			
											| Assessment of perception and behaviour by means of standardised tests | 595 | 1-902.0 |  | 
																			
											| Interdisciplinary measures for early postoperative treatment and early rehabilitation of ill elderly people | 293 | 8-550.1 |  | 
																			
											|  | 141 | 9-984.7 |  | 
																			
											|  | 122 | 9-984.8 |  | 
																			
											| Procedure for dialysing the blood outside the body with removal of the poison over a concentration gradient - dialysis | 95 | 8-854.2 |  | 
																			
											|  | 47 | 9-984.9 |  | 
																			
											| Examination of the oesophagus, stomach and duodenum by endoscopy | 33 | 1-632.0 |  | 
																			
											|  | 31 | 9-984.6 |  | 
																			
											| Measurement of the electrical activity of the heart without a tube (catheter) inserted into the heart via an artery | 18 | 1-266.0 |  | 
																			
											| Intensive care monitoring of respiration, the heart and the circulation without measurement of the pressure in the pulmonary artery and in the right atrium of the heart | 18 | 8-930 |  | 
																			
											| Treatment by injecting a medicine into an organ or tissue, or removal of excess fluid (effusion) e.g. from the joints | 17 | 8-020.x |  | 
																			
											| Transfusion of blood, red blood cells or platelets from a donor to a recipient | 17 | 8-800.c0 |  | 
																			
											|  | 16 | 8-98g.12 |  | 
																			
											| Examination of the large intestine by endoscopy - colonoscopy | 15 | 1-650.1 |  | 
																			
											|  | 15 | 9-984.b |  | 
																			
											| Taking a tissue sample (biopsy) of the upper digestive tract, biliary tract or the pancreas by endoscopy | 14 | 1-440.a |  | 
																			
											| Interdisciplinary measures for early postoperative treatment and early rehabilitation of ill elderly people | 14 | 8-550.0 |  | 
																			
											|  | 14 | 8-98g.11 |  | 
																			
											| Other operations on the spine | 13 | 5-839.a0 |  | 
																			
											| Measurement of the brain waves - EEG | 12 | 1-207.0 |  | 
																			
											| Computer-assisted analysis of the images with 3D-analysis | 11 | 3-990 |  | 
																			
											| Exchange or removal of a urinary catheter through the abdominal wall | 10 | 8-133.0 |  | 
																			
											|  | 10 | 8-98g.10 |  | 
																			
											| Ultrasound of the heart (echocardiography) through the oesophagus - TEE | 9 | 3-052 |  | 
																			
											| Radiotherapy with high-energy beams for cancer - high voltage radiotherapy | 8 | 8-522.91 |  | 
																			
											|  | 8 | 8-831.00 |  | 
																			
											| Examination of the oesophagus, stomach and duodenum by endoscopy | 7 | 1-632.1 |  | 
																			
											| Measurement of lung function in an airtight cabin - whole body plethysmography | 7 | 1-710 |  | 
																			
											| Examination of the urethra and the urinary bladder by endoscopy | 5 | 1-661 |  | 
																			
											| Cardiac or cardiopulmonary resuscitation | 5 | 8-771 |  | 
																			
											| Patient education | 5 | 9-500.0 |  | 
																			
											| Measurement of the electrical activity of the muscles - EMG | 4 | 1-205 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the large intestine | 4 | 5-452.61 |  | 
																			
											| Premature termination of an operation (operation not carried out completely) | 4 | 5-995 |  | 
																			
											| Keeping the respiratory tract open by means of a tube through the mouth or nose | 4 | 8-700.0 |  | 
																			
											| Use of a face, nasal, or laryngeal mask for mechanical ventilation | 4 | 8-706 |  | 
																			
											| Examination of the cerebrospinal fluid spaces | not specified | 1-204.2 |  | 
																			
											| Examination of nerve conduction - ENG | not specified | 1-206 |  | 
																			
											| Measurement of brain waves triggered by targeted stimuli (evoked potentials) | not specified | 1-208.2 |  | 
																			
											| Measurement of the electrical activity of the heart without a tube (catheter) inserted into the heart via an artery | not specified | 1-266.1 |  | 
																			
											| Examination of the left side of the heart with a tube (catheter) inserted into the heart via an artery | not specified | 1-275.0 |  | 
																			
											| Taking a tissue sample (biopsy) of the upper digestive tract, biliary tract or the pancreas by endoscopy | not specified | 1-440.9 |  | 
																			
											| Taking a tissue sample (biopsy) of the lower digestive tract by endoscopy | not specified | 1-444.6 |  | 
																			
											| Taking a tissue sample (biopsy) of the lower digestive tract by endoscopy | not specified | 1-444.7 |  | 
																			
											|  | not specified | 1-465.90 |  | 
																			
											| Taking a tissue sample (biopsy) of bone without surgical incision, guided by imaging procedures such as ultrasound | not specified | 1-481.4 |  | 
																			
											| Evaluation of swallowing with the help of a tube-shaped instrument with a camera mounted at the end (endoscope) | not specified | 1-613 |  | 
																			
											| Examination of the trachea and the bronchi by endoscopy | not specified | 1-620.01 |  | 
																			
											| Examination of the small intestine by swallowing a capsule containing a camera | not specified | 1-63a |  | 
																			
											| Examination of the large intestine by endoscopy - colonoscopy | not specified | 1-650.0 |  | 
																			
											| Examination of the S-shaped part of the large intestine (sigmoid colon) by endoscopy | not specified | 1-651 |  | 
																			
											| Analysis of the amount of carbon monoxide taken in and given off by the lungs | not specified | 1-711 |  | 
																			
											| Examination of the space between the lungs and ribs by taking a sample of fluid or tissue with a needle | not specified | 1-844 |  | 
																			
											| Examination of the abdominal cavity by taking a sample of fluid or tissue with a needle | not specified | 1-853.2 |  | 
																			
											| Examination of a joint or of a bursa by taking a sample of fluid or tissue with a needle | not specified | 1-854.7 |  | 
																			
											| Other examination by taking a sample of fluid or tissue with a needle | not specified | 1-859.x |  | 
																			
											| Assessment of perception and behaviour by means of standardised tests | not specified | 1-902.1 |  | 
																			
											|  | not specified | 1-999.42 |  | 
																			
											| X-rays of the oesophagus with contrast medium | not specified | 3-137 |  | 
																			
											| X-rays of the kidney and urinary tract with contrast medium | not specified | 3-13d.5 |  | 
																			
											| X-rays of the arteries in the abdomen with contrast medium | not specified | 3-604 |  | 
																			
											| X-rays of the arteries in the pelvis with contrast medium | not specified | 3-605 |  | 
																			
											| X-rays of small arteries with contrast medium | not specified | 3-608 |  | 
																			
											| Insertion of a temporary, artificial tracheal opening | not specified | 5-311.1 |  | 
																			
											| Insertion of a cardiac pacemaker or of a defibrillator | not specified | 5-377.1 |  | 
																			
											| Insertion of a cardiac pacemaker or of a defibrillator | not specified | 5-377.30 |  | 
																			
											| Surgical removal of a blood clot including the adjacent inner wall of an artery | not specified | 5-381.70 |  | 
																			
											| Surgical removal of a blood clot including the adjacent inner wall of an artery | not specified | 5-381.71 |  | 
																			
											| Surgical suture of blood vessels | not specified | 5-388.70 |  | 
																			
											| Surgical closure of a hole in the blood vessel wall with a skin or synthetic flap | not specified | 5-395.70 |  | 
																			
											| Surgical closure of a hole in the blood vessel wall with a skin or synthetic flap | not specified | 5-395.71 |  | 
																			
											| Other operations on blood vessels | not specified | 5-399.5 |  | 
																			
											| Surgical insertion of a tube into the stomach through the abdominal wall for artificial feeding | not specified | 5-431.20 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the stomach | not specified | 5-433.52 |  | 
																			
											| Other operations on the stomach | not specified | 5-449.d3 |  | 
																			
											| Surgical removal or destruction of diseased tissue in the small intestine | not specified | 5-451.92 |  | 
																			
											| Surgical removal of parts of the large intestine | not specified | 5-455.62 |  | 
																			
											| Other operations on the intestine | not specified | 5-469.10 |  | 
																			
											| Other operations on the intestine | not specified | 5-469.20 |  | 
																			
											| Other operations on the intestine | not specified | 5-469.d3 |  | 
																			
											| Other operations on the intestine | not specified | 5-469.e3 |  | 
																			
											| Surgical opening of the abdominal cavity or tissue lying behind (retroperitoneum) | not specified | 5-541.0 |  | 
																			
											| Surgical creation of a connection between the urinary bladder and skin of the abdomen for artificial urinary drainage | not specified | 5-572.1 |  | 
																			
											| Surgical incision, removal or destruction of diseased tissue in the urinary bladder, with access through the urethra | not specified | 5-573.40 |  | 
																			
											| Reduction of a fracture or a separated growth cartilage (epiphyseal cartilage) and external fixation of the bone fragments using devices such as screws or plates | not specified | 5-790.n1 |  | 
																			
											| Surgical reduction of a comminuted fracture in the joint region of a long bone and fixation of the bone fragments using devices such as screws or plates | not specified | 5-794.kk |  | 
																			
											| Surgical reduction of a dislocated joint | not specified | 5-79b.hg |  | 
																			
											| Surgical implantation of an artificial hip joint | not specified | 5-820.40 |  | 
																			
											| Re-operation, exchange or removal of an artificial joint in the arm or shoulder | not specified | 5-825.k1 |  | 
																			
											| Other operations on the spine | not specified | 5-839.a1 |  | 
																			
											| Surgical removal of diseased tissue from the skin or subcutaneous tissues | not specified | 5-894.0e |  | 
																			
											|  | not specified | 5-896.0g |  | 
																			
											|  | not specified | 5-896.18 |  | 
																			
											| Simple surgical closure of the skin or the subcutaneous tissues after injuries, e.g. with a suture | not specified | 5-900.04 |  | 
																			
											| Simple surgical closure of the skin or the subcutaneous tissues after injuries, e.g. with a suture | not specified | 5-900.18 |  | 
																			
											| Nature of the graft material | not specified | 5-930.3 |  | 
																			
											|  | not specified | 5-98c.0 |  | 
																			
											|  | not specified | 6-009.j |  | 
																			
											|  | not specified | 6-00b.f |  | 
																			
											| Intestinal lavage | not specified | 8-121 |  | 
																			
											| Exchange or removal of a feeding tube inserted into the stomach through the skin | not specified | 8-123.0 |  | 
																			
											| Exchange or removal of a feeding tube inserted into the stomach through the skin | not specified | 8-123.1 |  | 
																			
											| Injection or administration of medicines into the urinary bladder | not specified | 8-132.0 |  | 
																			
											| Insertion, exchange or removal of a ureteral stent | not specified | 8-137.00 |  | 
																			
											| Insertion of a small tube (cannula) or catheter into the space between the lungs and ribs for the drainage of fluid | not specified | 8-144.0 |  | 
																			
											| Insertion of a small tube (cannula) or catheter into another organ or tissue for the drainage of fluid | not specified | 8-148.1 |  | 
																			
											| Treatment by the targeted insertion of a needle into the chest with subsequent administration or removal of substances, e.g. fluid | not specified | 8-152.1 |  | 
																			
											| Treatment by the targeted insertion of a needle into the abdominal cavity with subsequent administration or removal of substances, e.g. fluid | not specified | 8-153 |  | 
																			
											| Other treatment by the targeted insertion of a needle with subsequent administration or removal of substances, e.g. fluid | not specified | 8-159.x |  | 
																			
											| Treatment by washing out (lavage) the abdominal cavity with a drain and temporary closure of the abdominal wall | not specified | 8-176.1 |  | 
																			
											|  | not specified | 8-192.0f |  | 
																			
											| Non-surgical reduction of a dislocated joint without surgical fixation of the bone using devices such as screws or plates | not specified | 8-201.g |  | 
																			
											| Interdisciplinary measures for early postoperative treatment and early rehabilitation of ill elderly people | not specified | 8-550.2 |  | 
																			
											| Treatment of cardiac arrhythmias with electric shocks - defibrillation | not specified | 8-640.0 |  | 
																			
											| Keeping the respiratory tract open by means of a tube through the mouth or nose | not specified | 8-700.x |  | 
																			
											| Insertion of a tube into the trachea for ventilation - intubation | not specified | 8-701 |  | 
																			
											| Transfusion of blood, red blood cells or platelets from a donor to a recipient | not specified | 8-800.c1 |  | 
																			
											| Transfusion of other plasma components or genetically engineered blood proteins | not specified | 8-812.53 |  | 
																			
											|  | not specified | 8-831.04 |  | 
																			
											| Insertion or exchange of a tube (catheter) in the pulmonary artery | not specified | 8-832.0 |  | 
																			
											| Treatment of a vessel with access via a tube (catheter) | not specified | 8-836.ma |  | 
																			
											| Treatment of a vessel with access via a tube (catheter) | not specified | 8-836.n3 |  | 
																			
											| Additional information on materials used | not specified | 8-83b.35 |  | 
																			
											| Other treatment of a vessel with access via a tube (catheter) | not specified | 8-83c.70 |  | 
																			
											| Procedure for dialysing the blood outside the body with removal of the poison over a concentration gradient - dialysis | not specified | 8-854.4 |  | 
																			
											| Procedure for dialysing the blood outside the body with removal of the poison over a concentration gradient - dialysis | not specified | 8-854.71 |  | 
																			
											| Pain control by injecting an anaesthetic around a nerve root or nerve close to the spine | not specified | 8-914.12 |  | 
																			
											| Intensive care monitoring of respiration, the heart and the circulation with measurement of the pressure in the superior vena cava (central venous pressure) | not specified | 8-931.0 |  | 
																			
											| Intensive care monitoring of respiration, the heart and the circulation with measurement of the pressure in pulmonary artery | not specified | 8-932 |  | 
																			
											| Radio-controlled cardiological telemetry | not specified | 8-933 |  | 
																			
											|  | not specified | 8-981.22 |  | 
																			
											|  | not specified | 8-98f.0 |  | 
																			
											|  | not specified | 8-98g.13 |  | 
																			
											|  | not specified | 8-98g.14 |  | 
																			
											|  | not specified | 9-984.a |  |