Medicare Advantage

Medicare Advantage (MA), also called Medicare Part C, is a private health plan alternative to traditional Medicare, administered by insurers under contract with the Centers for Medicare & Medicaid Services (CMS).

MA plans typically bundle in extra benefits, including dental, vision, and hearing, often at no additional premium beyond the standard Part B premium, in exchange for more restrictive provider networks and greater use of cost-management tools like prior authorization compared to traditional Medicare.

In practice, that trade means a beneficiary gives up some provider freedom in return for a more tightly managed plan that often carries lower out-of-pocket cost-sharing and a single, consolidated benefit package.

Why It Matters

Medicare Advantage has crossed a genuine tipping point: it is no longer an alternative to how most Medicare beneficiaries get their coverage, it is the default. That shift concentrates enormous administrative and financial complexity (claims, prior authorization, Star Ratings, risk adjustment) inside a private-plan structure operating under close federal oversight, which is exactly why MA operations require such deep, purpose-built expertise.

Each of those functions carries its own regulatory expectations and member-experience stakes, and a stumble in any one of them (a slow appeal, a mishandled grievance, an inaccurate risk-adjustment submission) can ripple directly into a plan's quality scores and its financial position. As enrollment concentrates in MA, the operational bar rises with it.

More than half (55%) of eligible Medicare beneficiaries are enrolled in Medicare Advantage in 2026, up from just 19% in 2007, and the Congressional Budget Office projects that share will reach 63% by 2034. (KFF, Medicare Advantage in 2026: Enrollment Update and Key Trends)

How It Works

• Enroll during an eligible window. Beneficiaries choose an MA plan during Initial Enrollment, Annual Open Enrollment (October to December), or a qualifying Special Enrollment Period. Each window has its own eligibility rules, and the choices a beneficiary makes here shape their network access and cost-sharing for the year ahead.
• Access care through the plan's network. Members generally use the plan's provider network, with referrals or prior authorization required for many services, unlike traditional Medicare's broader provider access. This network structure is central to how plans manage utilization and cost.
• Receive bundled extra benefits. Dental, vision, hearing, and sometimes benefits like transportation or meal delivery are included, structured and priced differently by each plan. These supplemental benefits are a primary reason beneficiaries select MA over unsupplemented traditional Medicare.
• Plan performance is measured and rewarded. CMS evaluates each plan annually against Star Ratings quality measures, which directly affect quality bonus payments and, in turn, a plan's ability to offer richer benefits the following year. Strong performance funds a better benefit package, creating a compounding advantage for plans that execute well.

Key Metrics & Benchmarks

The metric that determines a Medicare Advantage plan's competitive position and revenue is its CMS Star Rating, calculated from HEDIS quality measures, member experience surveys, and operational metrics like appeals turnaround time. Plans rated 4 Stars or above qualify for quality bonus payments that totaled $12.7 billion industry-wide in 2025, while plans that fall below that threshold lose access to that revenue entirely.

That gap is significant enough that Star Ratings performance is treated as a top-tier strategic priority, not a compliance afterthought, at nearly every MA plan. Because several measures are operational rather than clinical (how fast appeals and grievances are resolved, how members rate their experience) execution quality feeds directly into the rating.

Where Firstsource Fits

Because so much of a plan's Star Rating rests on operational execution, the back-office functions behind MA are strategic rather than clerical.

Firstsource helps plans protect Stars performance through faster, more accurate appeals and grievances processing and end-to-end population health and member operations support for Health Plans.

Turnaround time on appeals is itself a scored measure, so improving it is not just a service win but a direct lever on plan revenue.

That combination of quality and speed is what a leading dental plan achieved through strategic partnership, reducing cost while improving the member experience that Star Ratings ultimately reward.

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