Does an all-condition case management program for high-risk patients reduce health care utilization in medicaid and medicare beneficiaries with diabetes?

OBJECTIVE: To assess whether an all-condition case management program can improve health care utilization and clinical outcomes in patients with diabetes. RESEARCH DESIGN AND METHODS: 1342 patients with diabetes were enrolled in the Johns Hopkins Community Health Partnership (J-CHiP) Case Management program for high-risk patients with any chronic disease. We categorized participants into two intervention exposure categories based on the number of contacts with case manager (CM) and community health worker (CHW) per month: low contact (≤1 contact/month), and high contact (>1 contacts/month). The primary outcomes were rates of emergency department (ED) visits, hospitalizations, and 30-day hospital readmissions. RESULTS: In analyses adjusted for age, sex, race, risk score, and baseline health utilization rate, Medicaid participants in the high contact group had 42% (rate ratio (RR): 1.42; 95% CI: 1.08-1.86) and 64% (RR: 1.64; 95% CI: 1.08-2.48) higher risks for hospital admission and readmission, respectively, than the low contact group. Similar increases were seen in the Medicare participants with 20% (RR: 1.20; 95% 1.02-1.42) and 42% (RR:1.42; 95% 1.09-1.84) higher risks for admission and readmission, respectively. The associations were not statistically significant for ED visits. Subsidiary analysis of a subset with HbA1c available (n = 545) revealed a statistically significant decrease in HbA1c among Medicare participants (mean (SD): -0.17% (1.50%)), with a larger decrease in the high contact group (mean (SD): -0.23% (1.59%)). CONCLUSION: In an all-condition case management program for high-risk patients, the higher intensity of contacts with CHW and CM was not associated with a reduced health care utilization in adults with diabetes.