Joel Ackerman
Chief Financial Officer at DaVita
Thanks, Javier. Our second quarter adjusted operating income was $506 million, adjusted EPS was $2.59 and free cash flow was $654 million. Before I dive into the specifics on our performance for the quarter, let me add some detail to the change in reporting presentation of our non-GAAP results that Javier mentioned.
As a result of a recent common letter from the SEC to DaVita, we will no longer treat center closure costs as an adjustment in our non-GAAP presentations. These center closure costs impact our patient care costs, G&A and depreciation and amortization expense lines. Our adjusted OI and adjusted EPS for Q2 now includes center closure costs and our updated full year 2024 guidance shared today follows the same methodology. To help with comparisons to prior periods, we are also now showing prior period results under the new methodology.
In aggregate, these costs represent approximately $15 million per quarter in 2024 for a total of roughly $60 million expected this year. For comparison, center closure costs in 2023 were approximately $100 million. For 2025, we are forecasting $20 million to $30 million of center closure costs. These presentation changes have no impact on how we manage our business nor our overall profitability, cash flow or long-term expectations. With that, let me break down each of the components of our Q2 performance, starting with U.S. dialysis and specifically treatment volume.
Sequentially, treatments per day were up 1.1% in Q2 versus Q1. This increase was primarily due to census gains in the quarter and a seasonal improvement in mistreatment rate. Compared to the same period last year, second quarter treatments per day were up 50 basis points. This year-over-year growth was below our expectations as a result of two primary factors. First, severe weather events in May and June resulted in higher miss treatment rates, representing approximately 20 basis points of headwind on year-over-year treatment growth for the quarter. We have seen a similar but more pronounced disruption in July with the impact of Hurricane Beryl.
Second, U.S. net census gains were weaker than expected. Although new to dialysis admits grew for the sixth consecutive quarter, mortality was above our forecast. We expect both of these factors to negatively impact the second half of the year. For the full year, we now expect treatment volume growth will likely be between 0.5% and 1%. Revenue per treatment was up approximately $6 sequentially. This increase is primarily due to typical seasonality from higher patient coinsurance and deductibles in Q1. As Javier outlined, we now anticipate full year revenue per treatment growth of 3.5% to 4% for 2024.
Patient care cost per treatment were approximately flat quarter-over-quarter. Typical seasonal declines from items like higher payroll taxes in Q1 offset higher health benefit costs and other inflationary increases in the second quarter. Depreciation and amortization declined $12 million in Q2 versus Q1, and partially as a result of a decline in center closure costs. Center closure costs in D&A were approximately $50 million in 2023 compared to $10 million in 2024. Since these costs are now included in our adjusted D&A numbers, we now expect a year-over-year adjusted D&A decline of approximately $40 million to $50 million.
For Integrated Kidney Care or IKC, our value-based care business, operating income declined $8 million sequentially. As we have seen in the past, we expect results in the second half of the year to be significantly stronger than the first half as a result of the timing of revenue recognition. International operating income was flat quarter-over-quarter. We have closed our acquisitions in Ecuador and Chile and expect our acquisitions in Colombia to close in Q3 and in Brazil by year-end.
Moving now to capital structure. In the second quarter, we repurchased 2.7 million shares and to date, in Q3, we have repurchased an additional 1.1 million shares. Leverage at the end of Q2 was 3.1 times EBITDA. This was down from three months ago due to growth in trailing 12-month EBITDA and a reduction of net debt by over $200 million. As of the end of Q2, we held approximately $400 million of funding from Change Healthcare's parent, UnitedHealth Group, related to the cyber event earlier this year. As of today, that balance currently sits at approximately $300 million and we expect additional repayment to align with successful collections on impacted claims.
We continue to collect unchanged health care impacted claims and U.S. dialysis day-sales outstanding have declined by 14 days quarter-over-quarter. As always, we are assessing opportunities to optimize our capital structure, which includes looking to address the remaining balance of our Term Loan B maturing in 2026. We continue to target leverage within our range of 3 times to 3.5 times. To this end, we are also assessing opportunities to increase our debt to ensure sufficient capacity to maintain leverage within this range. To conclude, let me share some additional detail about our updated adjusted operating income and adjusted EPS guidance for 2024.
As Javier said, our new adjusted OI guidance range is $1.91 billion to $2.01 billion. There are several moving pieces within this number. So let me give you the key puts and takes. First, we are now including expenses related to center closure costs in this adjusted OI range. This is an approximate $60 million of additional operating expenses that were previously not in our adjusted OI guidance. To reiterate my earlier comments, this is a change in the presentation of our adjusted results and does not impact our GAAP financials or cash flows.
Second, additional RPT growth of approximately 50 to 100 basis points relative to our previous expectations, represents an increase of approximately $85 million at the midpoint.
Third, the range reflects improved expectations for patient care costs, mostly related to labor and productivity improvements which is mostly offset by our revised volume expectations for the full year.
Altogether, these changes represent an approximate $35 million increase in our adjusted operating income guidance at the midpoint of the range. We are also updating our 2024 adjusted earnings per share guidance to a range of $9.25 to $10.05 and primarily due to the increase in adjusted OI. That concludes my prepared remarks for today.
Operator, please open the call for Q&A.