Medicare Advantage / Part C

Medicare Advantage, demystified.

Medicare Advantage (Part C) is an alternative to Original Medicare, offered by private insurance companies that contract with Medicare. One plan covers your hospital (Part A), doctor (Part B), and usually prescription drug (Part D) costs — plus often dental, vision, hearing, and gym membership — frequently at $0 monthly premium beyond your standard Part B premium. The trade-off is a network of providers and prior-authorization rules. Original Medicare, by contrast, lets you see any doctor or hospital in the U.S. that accepts Medicare.

Updated May 2026

Reviewed by Evan Baker, Licensed CA Medicare Broker (Lic. #6014079)

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What Medicare Advantage is—and isn't

A Medicare Advantage (MA) plan is offered by a private insurance company that has a contract with Medicare. When you join an MA plan, you're still in Medicare—but the plan, not Original Medicare, becomes your primary coverage. The plan must cover everything Original Medicare covers (hospital + medical), and most plans also include prescription drug coverage (Part D) bundled in.



Many MA plans also include "extras" Original Medicare doesn't cover: routine dental, vision, hearing aids, gym memberships, over-the-counter allowances, and transportation to medical appointments.

MA vs. Original Medicare, side by side

Original Medicare + Medigap + Part D Medicare Advantage
Monthly premium Part B premium + Medigap premium + Part D premium Part B premium + (often $0) MA plan premium
Doctor / hospital network Any provider that accepts Medicare (almost all) Plan's network — out-of-network often costs more or isn't covered
Referrals to specialists Not needed Often required (especially HMO plans)
Out-of-pocket cap No cap (Medigap fills most gaps) Cap required (varies by plan)
Prior authorization Rare Common for many services
Dental, vision, hearing Not included Often included
Travels well outside CA? Yes — works nationwide Depends on plan; many are local
Plan changes year-to-year Original Medicare doesn't change; Medigap rarely does Can change premiums, network, formulary, copays each year

The four main plan types

HMO

Health Maintenance Organization

Lower premiums, smaller network. Usually requires a primary care doctor and referrals to see specialists. Out-of-network care is generally not covered (except emergencies).

Best for: stable in one geographic area, willing to use plan's network, want lower out-of-pocket costs.

PPO

Preferred Provider Organization

Larger network with the option to go out-of-network at higher cost. Usually no referral requirement. More flexibility, slightly higher premiums.

Best for: people who want flexibility, travel, or have specific specialists they want to keep without referral hassles.

PFFS

Private Fee-for-Service

You can see any provider that accepts the plan's payment terms. Less common than HMO/PPO. Coverage rules can be complex.

Best for: niche use cases. We'll usually steer toward HMO or PPO unless there's a specific reason.

SNP

Special Needs Plan

For people with specific chronic conditions (C-SNP), dual Medicare/Medicaid eligibility (D-SNP), or who live in institutions (I-SNP). Tailored networks and benefits.

Is Medicare Advantage right for me?

It depends. Here's the honest version:

✓ MA might fit if…

  • You want low to no monthly premiums and costs for covered Medicare services
  • Your preferred doctors are in the plan's network
  • You'd value extras like dental, vision, fitness
  • You stay mostly local (don't travel for months at a time)
  • You're comfortable with referrals and prior authorization

✗ Original + Medigap might fit better if…

Larger network with the option to go out-of-network at higher cost. Usually no referral requirement. More flexibility, slightly higher premiums.

Best for: people who want flexibility, travel, or have specific specialists they want to keep without referral hassles.

Compare your options

The right answer depends on your specific doctors, your specific drugs, your specific budget, and your specific tolerance for plan friction. There's no universally "best" plan—just the one that best fits you.

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