Antibiotic Prescribing Patterns Among U.S. Ophthalmologists and Optometrists from 2018 to 2021 in the Medicare Part D Database.

Purpose: To assess antibiotic prescribing patterns among ophthalmologists and optometrists from 2018 to 2021. Methods: This is an observational, retrospective cohort study of the Medicare Part D prescriber public use files from 2018 to 2020. Prescription trends were analyzed with analysis of variance and negative binomial regression tests based on specialty, region, and types of antibiotics. Results: From 2018 to 2021, the number of ophthalmologists in the Medicare Part D database decreased from 18,452 to 18,285, and the number of optometrists increased from 23,071 to 24,734. Throughout the study period, the total number and proportion of antibiotic prescriptions by ophthalmologists and optometrists stayed almost constant with a dip in 2020, likely reflecting the effects of the COVID-19 pandemic. Both ophthalmologists and optometrists demonstrated geographic regional differences in prescribing patterns. The South consistently had the highest average number of claims per provider. Of the antibiotics prescribed by ophthalmologists in 2021, 48.6% are from the fluoroquinolone class, 20.5% are from the aminoglycoside class, and 18.2% are from the macrolide class. Optometrists were found to be more likely to prescribe antibiotics in a formulation combined with a corticosteroid throughout the study period. Conclusions: Our results have shown that prescribing patterns among ophthalmologists and optometrists have demonstrated significant changes in prescriptions of microbial resistance-promoting antibiotics. These patterns persist despite nation-wide attempts to control antimicrobial resistance.