Underdosing of insulin and oral hypoglycemic drugs, init

This code signifies that a patient has experienced an adverse effect due to taking less insulin or oral antidiabetic medication than prescribed or indicated, leading to worsening glycemic control. This underdosing is not a medication error by a healthcare provider but rather an issue with the patient's adherence or the prescribed dosage being insufficient.

Use this code when a patient presents with hyperglycemia or other complications of diabetes because they intentionally or unintentionally took too little insulin or oral hypoglycemic medication. This applies to the initial encounter for the underdosing event and its immediate consequences.

• Always assign an additional code for the specific manifestation of the underdosing, such as uncontrolled diabetes (e.g., E11.65 for type 2 diabetes with hyperglycemia).
• This code is for patient-related underdosing, not for medication errors made by a healthcare professional (which would fall under different codes, such as T38.3X1-).
• The "A" seventh character indicates an initial encounter for the underdosing event. Subsequent encounters would use "D" or "S."