Integrating diabetes care into an oncology practice: A patient-centric model of care delivery at a safety-net health system.

2 Background: Oncologic treatments can disrupt glycemic control in people with diabetes and induce dysglycemia in individuals without diabetes through the use of steroids and/or targeted therapies. Severe hyperglycemia can result in delay/interruption of oncologic care and emergency department (ED) utilization. Here we report on an integrated model of diabetes care at a safety-net system, where patients commonly use the ED for their care. Methods: Parkland Health is an academic-affiliated safety-net system, primarily providing care for the un-/under-insured patients in Dallas County. An advanced nurse practitioner specializing in diabetes care (DM-ANP), supervised by an endocrinologist, was embedded in oncology clinics. Patients were referred to the DM-ANP by their oncology provider, or through an automated process if they had a recent hemoglobin A1c >8.0% or a random blood sugar > 250mg/dL. Patient education was provided by a trained nurse educator. Nutrition consult was available through an oncology dietitian. An acute hyperglycemia management protocol was developed to manage patients in the infusion center and prevent unnecessary ED visits. Results: Between March 2021 and March of 2024, the DM-ANP provided 4,276 visits to 797 distinct patients (average, 1425 visits per year). Breast cancer was the most common malignancy among patients seen in the integrated clinic. DM-ANP visits were coupled with oncology visits (clinic or infusion) or via telehealth, thereby increasing access and decreasing number of days patients had to come to clinic to receive care. Telehealth visit rate was highest in 2021 (27.5%) reflecting the impact of the pandemic, and subsequently dropped to 10.1% in 2023. Patients who were seen by the DM-ANP had an overall lower number of ED visits. Comparing prior vs post establishing care with the DM-ANP, the total number of ED visits by patients with diabetes significantly reduced in 2021-2022 (2021: 970 vs. 241, p <0.01; 2022: 796 vs. 501, p<0.01) before equilibrating in 2023-2024; (2023: 426 vs. 468, p=0.24). On average, patients had 1.2 less ED visits after receiving care from the DM-ANP. Since in-person visits were coupled with other oncology visits, the no-show rate for DM-ANP mirrored the rates for oncology clinics/infusion visits. Conclusions: Integrating diabetes/glycemic management into our oncology practice provided a patient-centric model of care delivery, improved visit adherence compared to an off-site model, reduced the time-toxicity by having fewer clinic visit days. Future directions include comparing oncologic outcomes in patients who had DM-ANP management to those who were managed by primary care.