Table 2.

ICD-10-CM phecode map reproducibility analysis.

Phenotype	Phecodesa	ICD-9-CMb cases (n)	ICD-10-CMc case|ICD-9-CM cased, n (%)
Hypertension	401.*	65,216	49,468 (75.85)
Hyperlipidemia	272.*	51,187	36,187 (70.7)
Type 1 diabetes	250.1*	5782	4412 (76.31)
Type 2 diabetes	250.2*	25,077	19,066 (76.03)
Intestinal infection	008.*	3410	273 (8.01)

^aIn the phecode column, * means ≥1 digits or a period (eg, phecode 401.*=phecodes 401, 401.1, 401.3, 401.22, 401.21, or 401.2)

^bICD-9-CM: International Classification of Diseases, Ninth Revision, Clinical Modification

^cICD-10-CM: International Classification of Diseases, 10th Revision, Clinical Modification

^dIn the last column, “ICD-10-CM case|ICD-9-CM case” indicates patients who were cases for the phenotype of interest during the ICD-9-CM period who were also ICD-10-CM cases