What code is assigned for postpancreatectomy diabetes mellitus?

The correct code for postpancreatectomy diabetes mellitus is found in the code E89.1. This code specifically describes endocrine and metabolic disturbances that occur after surgery, particularly in this case, following the removal of the pancreas, which can lead to diabetes mellitus as a consequence.

Postpancreatectomy diabetes mellitus occurs because the pancreas, which produces insulin, is no longer functioning effectively due to surgical removal. Using E89.1 allows for accurate documentation of diabetes that develops as a direct result of surgery, which is crucial for proper medical records and treatment plans.

The other options represent different conditions or classifications. Codes E08 to E13 pertain to various forms of diabetes mellitus and are used for existing diabetes diagnoses rather than complications due to surgical procedures. F50.2 refers to eating disorders, specifically a form of anorexia, which is unrelated to the context of postpancreatectomy complications. Z79.4 indicates long-term use of insulin, but does not specifically address the condition resulting from the surgery, thus not relevant to the diagnosis of postpancreatectomy diabetes.