Medicare Supplement

Is Medigap in Oakland Worth It? Start With the Letter

Oakland, Calif. — If you have Original Medicare and you're weighing a Medicare Supplement policy, the first thing to know is that Medigap is built from a short alphabet. Every policy sold to someone new to Medicare in California today is one of the federally standardized letter plans, and the letter — not the insurer's name — controls what the policy covers.

Medicare SupplementOakland, CA

That matters in Oakland because it changes the shopping question. Instead of asking which company has the "best" plan, you start by picking a letter that fits how you use care, then compare how different insurers price that same letter.

What Medigap is, and what it is not

Medigap is private insurance that helps pay some of the out-of-pocket costs Original Medicare leaves behind — things like the Part A hospital deductible, coinsurance, and some Part B cost sharing, depending on the letter you pick.

A few points trip people up:

• Medigap only works with Original Medicare (Part A and Part B). If you're on a Medicare Advantage plan, a Medigap policy can't pay your Advantage cost sharing.
• Medigap does not include prescription drug coverage. You'd add a stand-alone Part D plan for that.
• One Medigap policy covers one person. Spouses each need their own.

The letters you can buy in California today

Federal law standardizes Medigap into named plan letters. In California, someone newly eligible for Medicare today can choose from:

• Plan A
• Plan B
• Plan D
• Plan G
• High-deductible Plan G
• Plan K
• Plan L
• Plan M
• Plan N

Plans C and F still exist, but only for people who became eligible for Medicare before January 1, 2020. If that's you, you may still be able to buy them; if you became eligible later, they're off the menu.

Because the benefits inside each letter are set by law, a Plan N is a Plan N no matter whose logo is on the card. What changes from one company to another is the premium, the pricing method, and the customer service — not the covered benefits.

How Medigap pairs with Part D in 2026

Since Medigap doesn't cover prescriptions, most people who choose Medigap also enroll in a stand-alone Part D drug plan. A few 2026 facts worth knowing as you shop:

• Part D has a new out-of-pocket cap of $2,100 for the year.
• The Part D maximum deductible is $615.
• The old coverage gap ("donut hole") is gone as of 2025; Part D now has three phases.
• The Medicare Prescription Payment Plan lets you spread your drug costs across the year in monthly installments if you choose.
• Higher-income enrollees pay an IRMAA surcharge on Part B and Part D; for a single filer in 2026, IRMAA begins above $109,000 in income.

Part D enrollment happens on its own timeline. The Annual Enrollment Period runs October 15 through December 7 each year.

The California rules that shape the choice

Two things about California are worth flagging before you sign anything.

First, California has consumer protections that go beyond the federal baseline, including rules about when you can switch Medigap policies. These change over time and depend on your situation, so it's best to confirm current rights with the California Department of Insurance or your local SHIP counselor rather than rely on a summary.

Second, California insurers can use different methods to set Medigap premiums (for example, based on your age at purchase versus your current age). Two policies with the same letter can be priced very differently over time depending on the method used, so it's worth asking any insurer how the premium is structured before you enroll.

How to find and compare policies in Oakland

There's no single Medigap "marketplace" the way there is for Medicare Advantage, but there are reliable, no-cost tools:

• Medicare.gov Medigap policy search. Enter your Oakland ZIP code to see which insurers sell each letter in your area.
• California Department of Insurance rate guide. The state publishes a Medigap rate guide that shows premium ranges by company and plan letter.
• California SHIP (HICAP). Trained counselors provide free, unbiased help by phone and in person across Alameda County.
• 1-800-MEDICARE. Available 24/7 for questions about how Medigap, Original Medicare and Part D fit together.

If you'd like a side-by-side look at what each letter covers, the table below lists every plan available to new enrollees, with the benefits set by federal standards.