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Table 5 Outlier maps arranged in the decreasing order of the \(Z(\alpha )\) scores. As before, m is the number of candidate codes in a map whereas v is the number of valid representations in a map

From: Entropic measures of complexity in a new medical coding system

Map Map description m v \({Z(\alpha )}\)
3929 Other (peripheral) vascular shunt or bypass 1191 1191 4.87
8605 Incision with removal of foreign body or device from skin and subcutaneous tissue 415 415 4.06
8609 Other incision of skin and subcutaneous tissue 335 335 4.00
3950 Angioplasty of other non-coronary vessel(s) 1196 1196 3.68
0109 Other cranial puncture 34 34 3.68
843 Revision of amputation stump 349 349 3.60
9301 Functional evaluation 148 148 3.57
0404 Other incision of cranial and peripheral nerves 327 327 3.47
9788 Removal of external immobilization device 98 98 3.42
3979 Other endovascular procedures on other vessels 689 689 3.41
9223 Radioisotopic teleradiotherapy 768 768 3.38
046 Transposition of cranial and peripheral nerves 378 378 3.37
8382 Graft of muscle or fascia 440 440 3.35
0124 Other craniotomy 111 111 3.29
3926 Other intra-abdominal vascular shunt or bypass 720 720 3.29
409 Other operations on lymphatic structures 510 510 3.27
8196 Other repair of joint 313 313 3.26
9227 Implantation or insertion of radioactive elements 268 268 3.21
3897 Central venous catheter placement with guidance 48 320 3.15
0474 Other anastomosis of cranial or peripheral nerve 350 350 3.15
3821 Biopsy of blood vessel 699 699 3.08
8120 Arthrodesis of unspecified joint 582 582 3.06
3958 Repair of blood vessel with unspecified type of patch graft 421 421 3.05
8604 Other incision with drainage of skin and subcutaneous tissue 281 281 3.01
3348 other repair and plastic operations on bronchus 288 288 3.00
8129 Arthrodesis of other specified joints 552 552 3.00
2103 Control of epistaxis by cauterization (and packing) 10 8 3.00
9649 Other genitourinary instillation 5 5 2.97
3956 Repair of blood vessel with tissue patch graft 402 402 2.95
8100 Spinal fusion, not otherwise specified 282 282 2.88
8683 Size reduction plastic operation 340 340 2.84
9205 Cardiovascular and hematopoietic scan and radioisotope function study 54 54 2.83
0309 Other exploration and decompression of spinal canal 70 70 2.78
8080 Other local excision or destruction of lesion of joint, unspecified site 345 345 2.77
8040 Division of joint capsule, ligament, or cartilage, unspecified site 210 210 2.74
3925 Aorta-iliac-femoral bypass 320 320 2.73
3805 Incision of vessel, other thoracic vessels 78 78 2.71
  1. The map id and description correspond to ICD-9-CM Vol. 3 code and description, respectively