Medicare Advantage

Anthem's Medicare Advantage plans in Riverside for 2027: both HMO-POS options, side by side

Riverside, Calif. — October 2026. Anthem is offering two Medicare Advantage plans in Riverside County for the 2027 plan year, both HMO-POS and both with prescription drug coverage, according to the CMS Medicare Advantage Landscape Source File. That is the same number the carrier offered for 2026, and it is what Riverside shoppers will see when they open the Medicare Plan Finder during this fall's Annual Enrollment Period.

MyMedicarePlans.org is an independent consumer site; we are not Anthem and not Medicare. This article walks through what Anthem's local lineup looks like for 2027, what has changed, and how to check any plan against your own doctors and prescriptions before the December 7, 2026 deadline.

What Medicare Advantage plans does Anthem offer in Riverside for 2027?

Anthem offers 2 Medicare Advantage plans in Riverside County for 2027. Both are HMO-POS plans, and both include Part D prescription drug coverage. CMS groups the carrier as Elevance Health (Anthem) in its public files.

The plans, in alphabetical order, are:

• Anthem Prime (HMO-POS) — HMO-POS, with drug coverage
• Anthem Select (HMO-POS) — HMO-POS, with drug coverage

The table below lists every Anthem plan available in the county for 2027. For costs, copays, provider networks, drug formularies and star ratings, use the Medicare Plan Finder at medicare.gov or call 1-800-MEDICARE — those are the official sources, and the details are specific to each plan and to you.

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

For 2027, Anthem has 0 new Medicare Advantage plans in Riverside County, 0 plans not returning, and 0 renamed plans. In other words, the Anthem lineup Riverside shoppers saw in 2026 is the same shortlist they will see for 2027.

That does not mean nothing changes inside each plan. Every Medicare Advantage plan sends current members an Annual Notice of Change (ANOC) in September describing what will be different for the next plan year — things like the monthly premium, the drug deductible, cost sharing for a doctor visit, the pharmacy network, or which prescriptions are on which tier. If you are already enrolled in an Anthem plan, read the ANOC before the December 7 deadline.

Are there Anthem Special Needs Plans in Riverside County for 2027?

No. For 2027, Anthem is not offering a Dual Eligible SNP (D-SNP), a Chronic Condition SNP (C-SNP), or an Institutional SNP (I-SNP) in Riverside County. Both Anthem plans in the county are general-enrollment HMO-POS plans with drug coverage.

If you qualify for a Special Needs Plan — for example, because you have both Medicare and full Medi-Cal, or you live with a qualifying chronic condition — other carriers in the county may offer SNPs. The Medicare Plan Finder at medicare.gov lets you filter by SNP type.

How do I check an Anthem plan against my doctors and prescriptions before December 7?

Use three official checks, in this order, before you enroll in or stay with any plan.

1. Doctors and hospitals. Open the plan's provider directory on the carrier's website, or call the plan directly, and confirm every doctor, specialist and hospital you want to keep is in-network for the 2027 plan year. "In-network in 2026" is not the same as "in-network in 2027." 2. Prescriptions. Enter each drug you take — exact name, dose and quantity — into the Medicare Plan Finder at medicare.gov. The Plan Finder will show the plan's 2027 formulary tier, any prior authorization or step therapy, and the estimated cost at pharmacies near you. 3. Pharmacy. Confirm your pharmacy is a preferred or standard in-network pharmacy under the plan's 2027 contract. Mail order rules can also change year to year.

If anything on that list has shifted in a way you can't live with, you have until December 7, 2026 to switch to a different plan for January 1, 2027 coverage.

What else should Riverside shoppers know about 2027 Part D?

A few program-level numbers are already set for 2027 and apply to any Medicare drug plan, including the two Anthem offers in the county:

• The Part D out-of-pocket cap rises to $2,400 in 2027 (up from $2,100 in 2026). Once your true out-of-pocket spending on covered drugs hits that cap, you pay $0 for covered drugs for the rest of the year.
• The Part D maximum deductible is $700 in 2027 (up from $615 in 2026). A plan may charge less, but not more.
• The Part D national base beneficiary premium for 2027 is $41.33 — this is a formula input CMS uses, not what any particular plan charges.
• The coverage gap ("donut hole") remains eliminated; Part D has three phases.
• The Medicare Prescription Payment Plan remains available for members who want to spread drug costs across the plan year in monthly bills.

CMS has not yet published the 2027 Part B standard premium and deductible, or the 2027 IRMAA income brackets — those usually come out later in the fall. We will update coverage when they are released.

How does Anthem fit into the rest of the Riverside County market for 2027?

Anthem is one of 18 Medicare Advantage carriers offering plans in Riverside County for 2027. Across all carriers, Riverside County has 88 Medicare Advantage plans available for the 2027 plan year, per the CMS Landscape file.

So Anthem's two plans sit inside a much larger local lineup. If an Anthem plan is not the right fit for your doctors, drugs or budget, the Plan Finder will show you every other plan sold in the county.