Healthcare costs among patients with hemophilia A treated with factor replacement or bypassing agents.

Objective: To assess real-world costs for patients with hemophilia A treated with bypassing agents versus factor VIII (FVIII) replacement. Methods: Claims data from a large US health insurer during 1 January 2006-30 September 2014 were used for analysis. Treated patients with hemophilia A were identified based on >= 1 medical claim with a diagnosis code for hemophilia A (ICD-9-CM 286.0) and >= 1 medical or pharmacy claim for bypassing therapy and/or FVIII replacement during 1 January 2007-31 August 2014. The bypassing therapy cohort comprised patients with >= 1 claim for bypassing therapy; all others were assigned to the factor replacement therapy cohort. Post-index hemophilia-related costs were computed as combined health plan plus patient paid amounts for medical claims with hemophilia A diagnosis code or hemophilia therapy procedure code (bypassing therapy, FVIII replacement therapy, desmopressin, antifibrinolytic therapy), as well as pharmacy claims for hemophilia therapy. Results: The study sample represented 580 patients: 50 (8.6%) in the bypassing therapy cohort (mean age: 38.5 years; mean post-index period: 2.1 years) and 530 (91.4%) in the factor replacement therapy cohort (mean age: 29.3 years; mean post-index period: 2.7 years). Compared with the factor replacement therapy cohort, mean per-patient-per-month hemophilia-related total costs were 4.8-fold higher in the bypassing therapy cohort ($57,232 vs. $11,899), comprising 4.4-fold higher medical costs ($45,911 vs. $10,352) and 7.3-fold higher outpatient pharmacy costs ($11,321 vs. $1547). Conclusions: Patients with hemophilia A treated with bypassing agents between 2007 and 2014 incurred substantially higher monthly hemophilia-related medical and pharmacy costs than patients treated only with FVIII replacement.