. 2024 Mar 8;13:e52296. doi: 10.2196/52296

Table 2.

Grouping changes between the International Classification of Diseases, Tenth Revision (ICD-10) and the International Classification of Diseases, Eleventh Revision (ICD-11).

Classification system		ICD-11
		Group 1	Group 2	Group 3	Group 4	Group 5	Group 6	Group 7	Other chapters	No mapping
ICD-10 codes, n
	Group 1	23^a	91^a	352	N/A^b	N/A	N/A	N/A	8^a	2
	Group 2	N/A	N/A	N/A	57	N/A	N/A	N/A	N/A	N/A
	Group 3	11^a	N/A	1^a	N/A	146	N/A	N/A	1^a	N/A
	Group 4	11^a	18^a	N/A	N/A	N/A	48^a	51^a	2^a	2
ICD-10-CCM codes, n
	Group 1	93^a	499^a	1252	N/A	N/A	N/A	N/A	17^a	3
	Group 2	N/A	N/A	N/A	169	N/A	N/A	N/A	N/A	N/A
	Group 3	118^a	N/A	1^a	N/A	796	N/A	N/A	3^a	N/A
	Group 4	85^a	60^a	N/A	N/A	N/A	316^a	149^a	18^a	55

^aIndicates grouping changes. The ICD-10 and ICD-10-CCM no mapping codes were not included in the statistical analysis of this study. Hence, 755 ICD-10 codes and 3576 ICD-10-CCM codes were used for percentage and chi-square analyses.

^bN/A: not applicable.