Medicare Advantage plans in Hawaii

A Medicare Advantage plan (also called Part C) is an all-in-one alternative to Original Medicare, offered by private insurers that Medicare approves and pays. You still have Medicare, but the plan administers your Part A and Part B coverage and almost always folds in Part D drug coverage too. In Hawaii the market is unusual: two local organizations, Kaiser Permanente and HMSA (Blue Cross Blue Shield of Hawaii), cover most of the state, and national carriers sell alongside them on some islands. Which of them sells in your county, and which of your doctors they include, changes every year.

What’s usually included

• Hospital and medical coverage (your Part A and Part B benefits).
• Prescription drug coverage in most plans — so you don’t buy a separate Part D plan.
• Extras Original Medicare doesn’t cover, which can include dental, vision, hearing, fitness benefits, and an annual out-of-pocket maximum that caps what you spend on covered care.

Kaiser and HMSA: two different kinds of plan

Kaiser Permanente Senior Advantage is an HMO built on Kaiser’s own clinics and its Moanalua Medical Center on Oahu, with medical offices in Kona, on Maui and across Oahu. If your doctors are Kaiser doctors, Senior Advantage is how you keep them: Kaiser is an integrated system, and a Medigap policy does not pay for care inside it. Its 2026 service area is Honolulu County, most of Hawaii County and the island of Maui. Kaiser members on the Big Island or Maui who need care Kaiser does not provide locally are referred within Kaiser, usually to Oahu.

HMSA Akamai Advantage is built on HMSA’s statewide network of Queen’s, Hawaii Pacific Health, the public hospitals and independent physicians. HMSA sells separate plans for Oahu (Complete and Complete Plus) and for the neighbor islands (Standard and Standard Plus, both PPOs), and a Dual Care plan for people who also have Med-QUEST. The neighbor island plans include help with interisland travel when HMSA decides the specialty care you need is not available on your home island and refers you to a participating specialist elsewhere; HMSA’s visitor/traveler program extends in-network costs to a list of mainland states for members who travel. Both are plan-specific and change yearly; we read the Evidence of Coverage, not the brochure.

The trade-off: networks, island by island

Advantage plans are sold by county, and in Hawaii a county is an island or three. That is the single most important thing to check before you enroll: whether your doctors and your hospital are in the plan’s network, whether the plan covers the specialist you fly to Oahu for and how you get there, and whether your medications are on its drug list. Kauai, Molokai and Lanai have the shortest menus in the state. We confirm your providers, your prescriptions and the travel rules before you sign anything.

If your plan leaves your island, or you leave it

A non-renewal notice opens a Special Enrollment Period that runs past the normal deadlines, and because the plan left you involuntarily, federal rules give most people a guaranteed-issue right to buy a Medigap policy without medical underwriting, generally for 63 days after coverage ends. Moving your permanent residence to another island works the same way for the enrollment window. Hawaii has no birthday rule or annual Medigap window to fall back on afterward, so the window matters. A federally declared disaster or emergency — the August 2023 Maui wildfires triggered one — also opens a Special Enrollment Period for people who missed a deadline because of it.

Who Medicare Advantage tends to suit

People who want predictable, lower upfront costs and value bundled extras, who are comfortable using a plan network, and whose doctors are already inside Kaiser or HMSA’s network on their island. If you fly to Oahu or the mainland for care, see specialists outside the network, or want to use any provider that accepts Medicare, compare it against a Medigap policy — our Neighbor Islands guide walks through the difference. Military retirees with TRICARE For Life have their own calculation; see Veterans. State and county retirees on EUTF should read the Turning 65 guide first.

There are also specialized Advantage plans for specific situations: Chronic Special Needs Plans (C-SNPs), Institutional SNPs (I-SNPs), and Dual Special Needs Plans for people with both Medicare and Med-QUEST.