Table 3

Concordance between ICD-10-CM and SNOMED CT reorganising algorithms

Organ system*	Assignment by ICD-10-CM algorithm (count)	Assignment by SNOMED algorithm (count)	Concordant assignments (count)	Concordant assignments as proportion of ICD-10-CM codes† (%)	Proportion of the total problems (%) (n=24 034)
CV	148	186	148	100	8.5
END	125	147	122	98	8.8
ENT	108	107	97	90	6.8
EYE	50	63	50	100	0.4
GI	144	159	138	96	4.6
GUB	153	168	144	94	3.8
HEM	35	50	34	97	0.7
INF	103	303	92	89	2.5
INT	96	128	90	94	2.0
MS	590	469	469	79	9.8
NEO	54	60	52	96	0.4
NEU	145	258	141	97	5.0
PSY	129	131	114	88	16.5
RSP	70	107	60	85	4.0
SIGNS	220	305	207	91	26.2
Total	2170	2641	1958	90	100.0

*For acronyms, see table 1.
†Column 4 counts divided by column 2 counts.
ICD-10-CM, International Classification of Diseases, 10th Revision, Clinical Modification.