Key Takeaways Oak Street's higher medical benefit ratio weighed on CVS' results in early 2025.CVS' asset, Signify Health, offset pressures with strong in-home assessment volumes. CVS will focus on patient growth at existing Oak Street centers over rapid expansion.CVS Health’s (CVS) health care delivery asset, Oak Street Health, began to show signs of pressure in medical cost trends in the earlier months of 2025. In the second quarter, Oak Street posted a higher medical benefit ratio (MBR), mainly due to fac ...