Patient presents with a history of long-term insulin use for the management of diabetes mellitus.  The duration of insulin therapy is documented and the specific insulin regimen, including type (e.g., rapid-acting, short-acting, intermediate-acting, long-acting, premixed), dosage, frequency, and route of administration (subcutaneous injection or insulin pump) is detailed.  Current hemoglobin A1c (HbA1c) levels are recorded and assessed in relation to the patient's glycemic control targets.  Assessment includes evaluation for potential complications of long-term insulin therapy, such as hypoglycemia, weight gain, lipohypertrophy, or insulin resistance.  Patient education regarding insulin administration, blood glucose monitoring, sick day management, and potential adverse effects is reinforced.  Treatment plan includes ongoing monitoring of HbA1c, adjustments to insulin regimen as needed based on glycemic control and individual patient factors, and continued patient education on diabetes self-management.  Diabetes management plan is reviewed and updated.  ICD-10 code E11, Type 2 diabetes mellitus, or E10, Type 1 diabetes mellitus, with the appropriate Z79.4 code for long-term (current) drug therapy is appropriate, along with corresponding CPT codes for diabetes management and evaluation, such as 99213 or 99214 for established patient office visits or relevant telehealth codes.  Medical necessity for continued insulin therapy is documented.