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Table 1 The ten most frequent ICD-10 codes in each category of admissions 2005–2008 and 2012–2017

From: Relevant vs non-relevant subspecialist for patients hospitalised in internal medicine at a local hospital: which is better? A retrospective cohort study

ICD-10 code

Name

Speciality / Subspeciality

Number of Admissions

Category 1 – General internal medicine

 R07

Pain in throat and chest

General internal medicine

986

 J18

Pneumonia, unspecified organism

General internal medicine

550

 J15

Bacterial pneumonia

General internal medicine

527

 I63

Cerebral infarction

General internal medicine

335

 N39

Other disorders of urinary system (mainly UTI)

General internal medicine

331

 R55

Syncope and collapse

General internal medicine

328

 G45

Transient cerebral ischemic attacks and related symptoms

General internal medicine

301

 A46

Erysipelas

General internal medicine

184

 J20

Acute bronchitis

General internal medicine

162

 A41

Other sepsis

General internal medicine

114

Category 2 – Specific for subspecialists in internal medicine

 I48

Atrial fibrillation and flutter

Cardiology

718

 J44

Other COPD

Lung Medicine

704

 I21

Acute myocardial infarction

Cardiology

566

 I50

Heart failure

Cardiology

292

 I20

Angina pectoris

Cardiology

263

 Z95

Presence of cardiac and vascular implants and grafts

Cardiology

134

 R06

Abnormalities of breathing

Lung Medicine

108

 R10

Abdominal and pelvic pain

Gastroenterology

102

 I47

Paroxysmal tachycardia

Cardiology

101

 E11

Type 2 Diabetes Mellitus

Endocrinology

91

Category 3 – Outside internal medicine

 R42

Dizziness and giddiness

Outside internal medicine – ENT

214

 F10

Alcohol-related disorders

Outside internal medicine – psych

199

 H81

Disorders of vestibular function

Outside internal medicine – ENT

98

 R51

Headache

Outside internal medicine – neuro

79

 G40

Epilepsy and recurrent seizures

Outside internal medicine – neuro

62

 M79

Other and unspecified soft tissue disorders, not elsewhere classified

Outside internal medicine

57

 R41

Other symptoms and signs involving cognitive functions and awareness

Outside internal medicine

44

 C61

Malignant neoplasm of prostate

Outside internal medicine – urology

36

 G43

Migraine

Outside internal medicine – neuro

33

 F41

Other anxiety disorders

Outside internal medicine – psych

31