Table 1.

Number of patients estimated to have a disease based on 1 or more ICD-9 code alone vs. the phenotyping algorithm.

	1 or More ICD-9 Alone	Phenotype Algorithm
Bipolar Disorder	405	125
Coronary Artery Disease	3611	3287
Crohn’s Disease	657	562
Congestive Heart Failure	1130	487
Multiple Sclerosis	212	160
Rheumatoid Arthritis	787	687
Type-II Diabetes Mellitus	3331	2845
Ulcerative Colitis	518	400