Heart failure was identified as any occurrence of ICD-9 diagnosis codes 398.91, 402.x1, 404.x3, 425.xx, 428.xx, or V42.1; or a left ventricular ejection fraction less than 40%. Renal Conditions ...

We examined the positive predictive value of the International Classification of Diseases, 9th revision (ICD-9), codes used to identify cases of complicated peptic ulcer disease from the Saskatchewan ...

The new international disease classification system, known as ICD-10, is to be fully implemented Oct. 1. It includes more than 68,000 diagnostic codes -- compared to 14,000 in its predecessor, ICD-9.

ICD-10 employs 3–7 entities while ICD-9 uses 3–5 characters only. The number of procedure codes available in ICD-10 (71,924 codes) is 19 times higher compared to ICD-9 (3,824 codes).