Potential loss of revenue due to errors in clinical coding during the implementation of the Malaysia diagnosis related group (MY-DRG®) Casemix system in a teaching hospital in Malaysia

Table 2 Coding error rate by coding items

Coding items	Total case reviewed	Total error cases (%)	Kappa value	p value
Primary diagnosis code
All Cases	464	231 (49.8)	0.495	< 0.001
Medical	116	65 (56.0)	0.441	< 0.001
Surgical	116	47 (40.5)	0.581	< 0.001
O&G	116	61 (52.6)	0.444	< 0.001
Paediatric	116	58 (50.0)	0.460	< 0.001
Secondary diagnosis code
All Cases	464	377 (81.3)	0.108	< 0.001
Medical	116	98 (84.5)	0.180	< 0.001
Surgical	116	87 (75.0)	0.171	< 0.001
O&G	116	108 (93.1)	0.038	< 0.001
Paediatric	116	84 (72.4)	0.261	< 0.001
Primary procedure code
All Cases	464	236 (50.9)	0.159	< 0.001
Medical	116	66 (56.9)	0.010	< 0.001
Surgical	116	58 (50.0)	0.022	< 0.001
O&G	116	51 (44.0)	0.023	< 0.001
Peadiatric	116	61 (52.6)	0.013	< 0.001
Secondary procedure code
All Cases	464	270 (58.2)	0.210	< 0.001
Medical	116	67 (57.8)	0.176	< 0.001
Surgical	116	76 (65.5)	0.145	< 0.001
O&G	116	98 (84.5)	0.052	< 0.001
Peadiatric	116	29 (25.0)	0.202	< 0.001

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