Cost of Ranibizumab Port Delivery System vs Intravitreal Injections for Patients With Neovascular Age-Related Macular Degeneration.

IMPORTANCE

The study team investigated costs associated with the ranibizumab port delivery system (PDS) for neovascular age-related macular (nAMD), an alternative to conventional intravitreal anti-vascular endothelial growth factor (VEGF) injections.

OBJECTIVE

To investigate costs of intravitreal anti-VEGF injections vs ranibizumab PDS for patients with neovascular AMD (nAMD).

DESIGN, SETTING, AND PARTICIPANTS: This cost analysis used trial data and Medicare reimbursement rates and included patients with nAMD who were receiving ranibizumab, aflibercept, bevacizumab injections, or ranibizumab PDS.

MAIN OUTCOMES AND MEASURES

The number of intravitreal ranibizumab, aflibercept, and bevacizumab injections to break even with costs of ranibizumab PDS. Total direct medical costs over 1 year and 5 years for the ranibizumab PDS arm with refills at fixed 6-month intervals compared with monthly or bimonthly injections were calculated using Medicare rates. Scenario and sensitivity analyses accounted for uncertainty and variation.

RESULTS

The mean (SD) number of ranibizumab, aflibercept, and bevacizumab injections to break even with the cost of ranibizumab PDS with 1 refill was 10.8 (1.3), 9.3 (1.1), and 34.5 (4.2), respectively. Ranibizumab PDS with fixed 6-month refills over 1 year cost $21 016 ($2102). Comparatively, monthly intravitreal ranibizumab cost $1943 (95% CI, -$3047 to $6932; P = .34) more, aflibercept cost $5702 (95% CI, $253-$11 151; P = .04) more, and bevacizumab cost $16 732 (95% CI, -$20 170 to -$13 294, P < .001) less. For bimonthly injections, aflibercept cost $7658 (95% CI, -$11 649.52 to -$3665.61; P = .006) less. Over 5 years, monthly intravitreal ranibizumab projected to cost $25 581 (95% CI, $2275-$48 887; P = .04) more, aflibercept cost $44 374 (95% CI, $18 623-$70 125; P = .008) more, and bevacizumab cost $67 793 (95% CI, -$82 501 to -$53 085; P < .001) less than PDS with fixed refills (mean [SD] cost, $89 218 [$8921]). For bimonthly injections, aflibercept cost $22 422 (95% CI, -$40 287 to -$45,56; P = .03) less. In scenario analyses, ranibizumab PDS with refills as needed offered cost savings compared with real-world intravitreal ranibizumab or aflibercept use at 5 years but not at 1 year.

CONCLUSIONS AND RELEVANCE

In this cost analysis, ranibizumab PDS with 1 refill cost more than intravitreal ranibizumab or aflibercept injections if less than or equal to approximately 11 or 10 injections, respectively, are required within the first year. Long term, if less than 4.4 and 3.8 injections are needed per refill, intravitreal ranibizumab and aflibercept is lower cost. Ranibizumab PDS costs more than intravitreal bevacizumab injections throughout scenarios.