American Diabetes Association
dc22-1287 Online-only_supplemental_material.pdf (108.39 kB)

Effect of CGM access expansion on uptake among Medicaid patients with diabetes

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posted on 2022-12-08, 20:14 authored by Kevin Ni, Carolyn A. Tampe, Kayce Sol, Douglas B. Richardson, Rocio I. Pereira



Current studies on continuous glucose monitor (CGM) uptake are revealing for significant barriers and inequities for CGM use among patients from socially underprivileged communities. This study explores the effect of full subsidies regardless of diabetes type on CGM uptake and HbA1c outcomes in a US Medicaid adult patient population. 


This retrospective cohort study examined 3036 adults with diabetes enrolled in a US Medicaid program that fully subsidized CGM. CGM uptake and adherence was assessed by CGM prescription and dispense data including >1 fill and adherence by medication possession ratio (MPR). Multivariate logistic regression evaluated predictors of CGM uptake. Pre- and post-CGM use HbA1c were compared. 


CGM were very well received by both individuals with type 1 diabetes and individuals with type 2 diabetes with similar high fill adherence levels (mean MPR 0.78 vs. 0.72, p = 0.06). No significant difference in CGM uptake outcomes were noted among major racial/ethnic groups. CGM use was associated with improved HbA1c among those with type 2 diabetes (-1.2% (13.1 mmol/mol), p < .001) that was comparable between major racial/ethnic groups; and those with higher fill adherence achieved greater HbA1c reduction (-1.4% (15.3 mmol/mol), p < 0.001) compared to those with lower adherence (-1.0% (10.9 mmol/mol), p <0.001).


CGM uptake disparities can largely be overcome by eliminating CGM cost barriers. CGM use was associated with improved HbA1c across all major racial/ethnic groups highlighting broad CGM appeal, utilization, and effectiveness across an underprivileged patient population.  


Denver Health DOM AEF x 40150831

NIH/NHLBI, USA x 1F30HL136169-03

Robert Wood Johnson Foundation 77887