Medicare Advantage

Kaiser Permanente's 2027 Medicare Advantage plans in Riverside: how to check yours before Dec. 7

Riverside, Calif. — Fall 2026. If you have a Kaiser Permanente Medicare Advantage plan in Riverside, this is the stretch of the year when it pays to look closely at what you have and what the carrier is offering for 2027. Kaiser Permanente is bringing three Medicare Advantage plans to Riverside County next year, and one of its 2026 plans is not returning. The Annual Enrollment Period runs October 15 through December 7, 2026, and any change you make takes effect January 1, 2027.

MyMedicarePlans.org is an independent news and education site. We are not Kaiser Permanente, and we are not Medicare. The plan counts below come from the CMS Medicare Advantage Landscape Source Files; the specifics of any one plan come from the plan itself.

Which Kaiser Permanente Medicare Advantage plans are offered in Riverside for 2027?

Kaiser Permanente is offering 3 Medicare Advantage plans in Riverside County for 2027. All three are HMOs, all three include Part D prescription drug coverage, and one is a Dual-Eligible Special Needs Plan (D-SNP) for people who have both Medicare and Medi-Cal.

Spelled exactly as CMS lists them, the 2027 plans are:

• Kaiser Permanente Dual Complete South P6 (HMO D-SNP)
• Kaiser Permanente Senior Advantage Inland Empire (HMO)
• Kaiser Permanente Sr Advantage Inland Empire Value (HMO)

Riverside sits inside Riverside County, where plan availability is set. The table below lists every plan in the lineup. We are not quoting any premium, copay, deductible, network detail or star rating here — those live in each plan's own Summary of Benefits and Evidence of Coverage.

What is new or not returning from Kaiser Permanente in Riverside County for 2027?

For 2027, Kaiser Permanente has 0 new plans and 1 plan that is not returning in Riverside County, with no renames. If you were enrolled in the plan that is going away, Kaiser Permanente will send you a notice explaining your options; you will need to pick a new plan during the Annual Enrollment Period if you want coverage with a specific carrier starting January 1.

For continuing plans, the details that can change year to year — the drug list (formulary), the pharmacy network, the provider network, cost sharing and extra benefits — are spelled out in each plan's Annual Notice of Change (ANOC), which is mailed each fall. It is worth reading cover to cover even if your plan name looks the same.

How many other Medicare Advantage carriers sell plans in Riverside County for 2027?

Kaiser Permanente is one of 18 carriers offering Medicare Advantage plans in Riverside County for 2027, and together those carriers offer 88 plans countywide. That matters because you are not limited to one company's lineup — the Annual Enrollment Period is your chance to compare across carriers, not just within one.

If you want to stay with Kaiser Permanente, your choice is among the three HMO plans listed above. If you want to look wider, the Medicare Plan Finder at medicare.gov will show you every plan sold in your ZIP code.

How do I check a Kaiser Permanente plan against my doctors and prescriptions before December 7?

Do this before you enroll — not after. For each plan you are considering:

1. Go to medicare.gov/plan-compare and enter your ZIP code and the list of prescriptions you take, with doses and quantities. The tool will show you which plans cover each drug and at what tier. 2. Check the doctor and hospital network. For an HMO, you generally need to use in-network providers except for emergencies. Confirm your primary care doctor, specialists and preferred hospital are in the plan's network for 2027 (networks can change on January 1). 3. Check the pharmacy network. The pharmacy you use may be "preferred," "standard" or out-of-network, which affects what you pay. 4. Read the Summary of Benefits for any plan on your short list, and the Evidence of Coverage if you want the full rulebook. 5. Call 1-800-MEDICARE (TTY 1-877-486-2048) if you want a neutral walk-through.

What is changing in Medicare itself for 2027?

A few program-wide numbers CMS has already confirmed for 2027:

• The Part D out-of-pocket cap rises to $2,400 in 2027 (up from $2,100 in 2026). Once your out-of-pocket spending on covered drugs hits that cap, you pay $0 for covered Part D drugs for the rest of the year.
• The Part D maximum deductible is $700 in 2027 (up from $615 in 2026). Plans can set a lower deductible, but not a higher one.
• The Part D national base beneficiary premium is $41.33 for 2027. This is a formula input CMS uses — it is not what any particular plan charges.
• The Medicare Prescription Payment Plan continues as an option to spread your drug costs across the year in monthly payments instead of paying at the pharmacy counter.

CMS has not yet announced the 2027 Part B standard premium and deductible or the 2027 IRMAA income brackets. Those are usually published in the fall, typically in November. We will not estimate them here.

What happens if I do nothing by December 7?

If you take no action, your current plan renews on January 1, 2027 — if it is being offered next year — with the changes described in your Annual Notice of Change. If your plan is one of the ones not returning in Riverside County, you will not be automatically moved to a similar plan from the same carrier. You will need to pick a new plan during the Annual Enrollment Period, or you can be enrolled in Original Medicare and separately shop for a stand-alone Part D plan.

There is also a second window: the Medicare Advantage Open Enrollment Period, January 1 – March 31, 2027, when people already in a Medicare Advantage plan can switch to another MA plan or return to Original Medicare one time.