John Rex
Chief Financial Officer at UnitedHealth Group
Thank you, Dirk. Fundamental execution has long been an essential aspect of UnitedHealth Group's ability to deliver for all those we serve. We know that if we meet or exceed our commitments and strive to live up to our potential, we will continue to generate high-quality, durable growth.
Our first-quarter performance was highlighted by the strong and accelerating growth achieved across the businesses at UHC and Optum. We accomplished this while continuing to expand upon the foundation, which will drive the future growth you have come to expect from us.
Revenue in the first-quarter of $92 billion grew by nearly $12 billion or 15% over the prior year with double-digit growth at both Optum and UnitedHealthcare. This growth was achieved by serving more people across all our businesses, and importantly by serving them more comprehensively. UnitedHealth Group served -- UnitedHealthcare served about 1.2 million more people in the first three months of the year with strong growth across commercial, Medicare and Medicaid. Optum revenues grew 25% to $54 billion.
Care patterns remain largely consistent with recent trends, for example, inpatient trends continue to reflect the growing, long-term movement towards ambulatory sites of care. Today, nearly two-thirds of orthopedic procedures are performed in outpatient and other ambulatory settings compared to under one-quarter just five years ago. Physician office activity continues to trend towards historic levels. While a few categories such as pediatrics remain lower, emergency room visits remain modestly lower than historical levels, with consumers seemingly more comfortable with virtual and walk-in care.
Cancer and cardiac screenings are occurring at roughly pre-pandemic levels, helped in part by focused efforts to ensure people are obtaining appropriate preventive care. As always, we continue to closely analyze data for indications which could signal an increasing acuity but have yet to see those emerge.
Looking now at the performance of the individual businesses in the first quarter. Optum Health revenues grew by 38% to $23 billion, as we expanded the number of patients served under value-based care arrangements. Revenue per consumer served grew by 34%, driven by the increase in value-based care patients and then the level of care we can offer.
Optum Insight revenues grew 40% to $4.5 billion. The revenue backlog reached $00.7 billion, an increase of nearly $8 billion over last year, in part due to the addition of Change Healthcare. As we have discussed before in the first half, we expect to continue to increase our integration and investment activities which were a component in the first-quarter results, and we expect they will accelerate into the second quarter.
Optum Rx revenues grew 15%, surpassing $27 billion, driven by strong double-digit growth across the businesses, including in our community and home delivery pharmacies. Script growth of $26 million over last year was driven by exceptional customer retention as well as new customer adds. We continue to see strong growth in NPS for our specialty businesses, up nearly 10 points since last year.
At UnitedHealthcare, revenues of over $70 billion grew 13% with growth in the number of people served across all of our major benefit categories. For example, in commercial, we set out to serve up to 1 million more people this year and are pacing well to that objective given our first-quarter performance. Offering for large employers led to gains, as did our newer and more affordable offerings, serving both employers and individuals.
Within Medicare Advantage, we shared with you in November our intention to add 800,000 to 900,000 new members in this year, and we now expect to exceed the upper-end of that range. The consistent consumer receptivity to our offerings underscores the product's stability and value we provide for seniors.
Medicaid membership grew 570,000 over the year ago quarter. We continue to have momentum in Medicaid with recent wins in Indiana and Texas, and we are honored to advance our existing service to the people of North Carolina, as the state moves towards expanding Managed Medicaid offerings.
Our capital capacity has remained strong. Cash flows from operations in the quarter at $16.3 billion reflected an additional CMS payment. Adjusting for this effect, first-quarter cash flows from operations were consistent with our outlook, and we continue to track well with our full-year view to approach $28 billion, about 1.2 times net income.
In the quarter, we returned over $3.5 billion to shareholders through dividends and share repurchases and deployed about $8 billion of growth capital to expand our capabilities to serve more people and grow far into the future.
As Andrew mentioned, based upon this growth outlook, today, we increased our full-year 2023 adjusted earnings outlook to a range of $24.50 to $25 per share. We expect the first half, second half earnings progression to be broadly consistent with our longer-term historical patterns, would be second-half comprising just slightly more than half of the full year.
Now, I will turn it back to Andrew.