AHA Coding Clinic® for ICD-9 - 2004 Issue 4; VOLUMES 1 AND 2 NEW/REVISED DIAGNOSIS CODES

Diabetes Mellitus Type 1 and Type 2

Effective October 1, 2004 changes have been made to the fifth digits applicable to category 250, Diabetes mellitus. This change has been made to make the classification consistent with current terminology used to describe diabetes mellitus. The two main types of diabetes are no longer properly referred to as “insulin-dependent” and “noninsulin dependent.” The current distinction is now based on the functioning of the pancreatic beta cells. In type I (or type 1) diabetic patients, pancreatic beta cells are absent following destruction by an autoimmune process. These patients must use insulin. In type II (or type...

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