Advancing Whole Health Through Trusted Physician Partnerships

Contributing experts: Matt Miller, MD and Shawn Gallagher

Created in 2024 by Elevance Health and private equity firm Clayton, Dubilier & Rice, Mosaic Health unites Millennium Physician Group, apree health, and CareMore Health to strengthen primary care nationwide.

Serving people in 19 states, Mosaic Health connects clinicians with care teams, insights, and technology to improve coordination, performance, and outcomes. It supports people across multiple types of coverage including Medicare, Medicare Advantage, Exchange, D-SNP (Dual Eligible Special Needs Plan), C-SNP (Chronic Condition Special Needs Plan), and commercial health plans.

Putting Physicians at the Center of Care

Millennium was founded on a simple belief: physicians should remain at the heart of care delivery. Today, over 1,000 Millennium clinicians deliver coordinated, high-quality, value-based care across four states — supported by advanced analytics, clinical pathways, and unified technology.²

Patient-centered primary care drives every decision, empowering clinicians to deliver proactive, personalized care. Through early detection and evidence-based practices, Millennium improves outcomes and manages costs responsibly. Continued investment in technology and operations enhances experiences for patients and care providers while expanding access to high-quality care.

Preventing Problems Before They Start

Millennium physicians are seeing the impact of proactive, coordinated care firsthand.

“We’re not just reacting to problems: we’re preventing them,” says Emie Kuyumjian, MD, and Millennium Physician Advisory Board member. “With access to data, care management support, and same-day resources, I can focus on what matters most — my patients. You can feel the difference in our patients’ trust and in how seamlessly our teams collaborate.”

Together, we’re making care more proactive, connected, and effective.

Proven Impact, Real Results.

As part of Mosaic Health, Millennium is meeting the need for comprehensive primary care while modeling successful, physician-led value-based care.

768K+ patients served across 200 locations¹

85.6% patient satisfaction³

“

At Millennium, we’ve built a model of care that works for both patients and physicians. With data, technology, and a team-based infrastructure, we remove barriers so physicians can focus on what matters most — delivering high-quality, relationship-based care. Patients benefit from earlier interventions, better coordination, and a more seamless experience, while physicians have the tools and support to practice medicine the way it’s meant to be — personal, proactive, and purposeful.

Kevin Spencer, MD

Millennium National Chief Medical Officer and Chair of the Millennium Physician Advisory Board

Why Advanced Primary Care Matters for Health Plans

By expanding the advanced primary care footprint, Mosaic Health and Elevance Health work together to improve member outcomes, strengthen care provider performance, and build a more sustainable healthcare system.

Part of a Broader Commitment to Tailored Care Provider Partnerships

Each part of Mosaic Health is built on the foundation of value-based care that functions with primary care at its center. Millennium, apree health, and CareMore Health all benefit from collaboration and data sharing with Elevance Health that helps their care providers succeed in value-based care environments and deliver on the shared goal of whole-person health.

Delivering Elevated Results for Health Plans and Members⁴

Improved member experience and retention through same-day access, care continuity, and high satisfaction.
Better performance outcomes with measurable gains in quality, affordability, and reduced avoidable hospitalizations.
Sustainable growth by adding capacity in high-need markets and supporting care providers’ transition to value-based models.

The Power of Partnership

Meaningful progress happens when data, innovation, and clinical expertise come together with a shared purpose. Through partnerships like the one that formed Mosaic Health, our care provider collaborators are redefining what’s possible in primary care — and shaping a healthier future for their patients.

1 Millennium patient panel report, January 2026.
2 Millennium physician roster, December 2025.
3 Patient experience score file, January 2026.
4 Millenium Physician Group internal analysis, January 2026.

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