Sam Hazen
Chief Executive Officer at HCA Healthcare
All right. Frank, thank you. Good morning to everybody, and thank you for joining the call. The positive fundamentals we saw in our business this past year continued into the first-quarter of 2024. This momentum generated strong financial results that were driven by broad-based volume growth, improved payer mix, and solid operating margins. As we look to the rest of the year, we remain encouraged by our performance, the overall backdrop of growing demand for our services, and our enhanced stability across our networks to serve our communities. The people of HCA Healthcare continue to deliver for our patients with improvements in key non-financial metrics, including improved quality outcomes, more efficient process measures in emergency room services, which have accelerated time to discharge and increased satisfaction, and finally, better inpatient capacity management with reduced length of stay and increased acceptance of patients who needed to be transferred to our hospitals.
As compared to the prior year, diluted earnings per share as adjusted increased almost 9% in the first-quarter to $5.36. Same facilities volumes were favorable across the company. Inpatient admissions grew 6% year-over-year. Inpatient surgeries were up almost 2%, equivalent admissions grew 5%, and emergency room visits increased 7%. Most of our other volume categories, including cardiac procedures and rehab admissions also had solid growth metrics in the quarter. While outpatient surgery revenue increased year-over-year due primarily to favorable payer mix, total cases declined 2%. We attribute most of this decrease to the effect of the calendar and the redetermination process, which drove a considerable decline in Medicaid volume.
All domestic divisions had growth in inpatient admissions and equivalent admissions. And finally, payer mix and acuity levels improved as compared to the prior year. Commercial volumes represented approximately 36% of equivalent admissions. Last year, they were 34% of the total. The case-mix for our inpatient business increased slightly, continuing the upward trend we have seen over the past few years. Same facilities revenue grew almost 9% as a result of these volume metrics, coupled with 3.5% higher reimbursement per equivalent admission. We continue to make progress on our cost agenda.
Operating costs across most categories were in-line with our expectations. As part of our capital spending plan, the number of facilities or sites for care increased by almost 5% to around 2,600 and we added approximately 2% to our inpatient bed capacity. As we move through the remainder of the year, we will maintain a disciplined approach to our operations while continuing to invest appropriately in our strategic agenda, which we believe should position the company favorably to meet our long-term objectives. With that, I will turn the call to Bill for his last earnings call. I want to congratulate him again on his tremendous career with the company. It's been my privilege to work with him over these years. I want to thank him for a job well done.