Table 2. Causes of readmission according to ICD-10 codes (only diseases with 10 or more cases are included).

	ICD-10 codes	Disease	Number of cases
Gastric Cancer	T81	Complications of procedures, not elsewhere classified	120
	K91	Postprocedural disorders of digestive system, not elsewhere classified	104
	C16	Malignant neoplasm of stomach	98
	K56	Paralytic ileus and intestinal obstruction without hernia	45
	E86	Volume depletion	35
	K65	Peritonitis	34
	J69	Pneumonitis due to solids and liquids	17
	K92	Other diseases of digestive system	16
	R63	Symptoms and signs concerning food and fluid intake	12
	J18	Pneumonia, organism unspecified	11
Colon Cancer	K91	Postprocedural disorders of digestive system, not elsewhere classified	83
	K56	Paralytic ileus and intestinal obstruction without hernia	40
	T81	Complications of procedures, not elsewhere classified	20
	C18	Malignant neoplasm of colon	11
Lung Cancer	J86	Pyothorax	54
	C34	Malignant neoplasm of bronchus and lung	39
	J93	Pneumothorax	31
	J18	Pneumonia, organism unspecified	30
	J90	Pleural effusion, not elsewhere classified	25
	J95	Postprocedural respiratory disorders, not elsewhere classified	21
	J15	Bacterial pneumonia, not elsewhere classified	21
	J84	Other interstitial pulmonary diseases	21
	T81	Complications of procedures, not elsewhere classified	21
	J98	Other respiratory disorders	16
	I50	Heart failure	14
	I63	Cerebral infarction	14