Among 807 patients with type 1 diabetes, 128 (16%) did not redeem any prescriptions for glucose-monitoring reagent strips in the three-year study period. Only 161 (20%) redeemed prescriptions for enough reagent strips to test glucose daily. The corresponding figures for the 790 patients with type 2 diabetes who used insulin were 162 (21%; no strips) and 131 (17%; daily tests). Here, INS is linked to type 1 diabetes mellitus.