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Table 2 ICD-10-AM Chapters with code numbers excluded in algorithm

From: Development of a validation algorithm for 'present on admission' flagging

Chapter

Code group

 

Algorithm exclusions

N of

codes in chapter

% chapter excluded

Chapter 1

AB

Infectious and parasitic disease

269

766

35.1

Chapter 2

C/D

Neoplasms

790

790

100.0

Chapter 3

part D

Anaemia & other blood diseases

54

164

32.9

Chapter 4

E

Endocrine

274

458

59.8

Chapter 5

F

Mental/behavioural

256

448

57.1

Chapter 6

G

Nervous system

114

387

29.5

Chapter 7/8

H

Eye & ear

75

372

20.2

Chapter 9

I

Circulatory system

142

396

35.9

Chapter 10

J

Respiratory system

76

233

32.6

Chapter 11

K

Digestive system

263

455

57.8

Chapter 12

L

Skin

115

348

33.0

Chapter 13

M

Musculoskeletal system

2031

3361

60.4

Chapter 14

N

Genitourinary system

207

435

47.6

Chapter 15

O

Pregnancy & childbirth

139

436

31.9

Chapter 16

P

Perinatal

115

366

31.4

Chapter 17

Q

Congenital abnormalities

887

887

100.0

Chapter 18

R

Symptoms NEC

6

334

1.8

Chapter 19

S/T

Injuries

44

1785

2.5

Chapter 20

U-Y

External causes' of morbidity

1508

2905

51.9

Chapter 21

Z

Factors influencing health status

638

684

93.3

Appendix A

 

Morphology of neoplasms

2408

2408

100.0

  

Total

10411

18418

56.5