Reimbursement denial and reversal by health plans at a university hospital

Purpose Denial and downgrading of reimbursement for hospital days are two strategies utilized by health plans to maintain profitability. The goal of this study was to describe patterns of discounted reimbursement at a university hospital. Methods We performed a retrospective cohort study of consecutive per diem patients hospitalized in 1999. We defined a discounted day as a day fully denied or downgraded and a reversal day as a day reimbursed at a higher level after appeal. The study outcomes included the probability of a discounted day and the probability of a discounted day to be later reversed. Covariance logistic regression was used to compare these outcomes by plan and physician specialty after adjusting for age, sex, race, length of stay, and diagnosis. Correlations with plan characteristics were analyzed. Results Of 59,265 hospital days, 6074 days (10.2%) were initially denied or downgraded. On appeal, 1755 discounted days (28.9%) were reversed. The percentage of days discounted per plan ranged from 1.2% to 18.8% (P <0.001), whereas the percentage of discounted days that were later reversed ranged from 23.2% to 85.3% (P <0.001). The qualitative magnitude of these associations and statistical significance were unchanged in adjusted models. Strong correlations were found between the adjusted odds ratio for a discounted day and net profit margin (R = 0.81) and medical loss ratio (R = −0.77). Conclusion Denials and downgrades are frequent, with marked variation by health plan. More profitable plans had higher denial and discount rates. Evidence-based standards for denials and downgrades are needed to maintain optimal patient care and the fiscal health of hospitals and health plans.