Medicare Advantage

Did Your ANOC Arrive? A Chula Vista AEP Walkthrough

For 2027, Chula Vista is looking at 85 Medicare Advantage plans: 18 new, 26 gone since 2026, and 48 still here but changed on premium, deductible, plan type or name, 20 of them under a new name. Below, how the lineup shifted in San Diego County and what to compare, with no plan ranked or recommended.

Chula Vista, Calif. — Fall 2026. If you have a Medicare Advantage or Part D plan, the envelope that arrived in September is doing a lot of quiet work. It is your Annual Notice of Change, or ANOC, and it tells you what will be different about your plan in 2027. Reading it carefully — and comparing it to the doctors, hospitals and prescriptions you actually use — is the single most useful thing you can do before the Annual Enrollment Period closes on December 7, 2026.

Nothing happens if you do nothing: your current plan simply renews on January 1, 2027, with whatever changes the ANOC describes. The point of this window is to make sure those changes still fit your life.

What is the ANOC and why does it matter for 2027 coverage?

The Annual Notice of Change is the document your Medicare Advantage or Part D plan mails each September describing what will be different about the plan on January 1, 2027. It is not junk mail. It lists next year's premium, deductible, copays and coinsurance, drug formulary tier changes, pharmacy network updates, and any changes to extra benefits like dental, vision or over-the-counter allowances.

Set it next to your current Evidence of Coverage (the longer booklet) and look line by line. If a number or a benefit has moved, you want to know now — not in February.

What should Chula Vista residents check against the 2027 plan?

Check three lists against the plan's 2027 details: your doctors, your hospitals, and your prescriptions. Networks and formularies change every year, and a plan that fit perfectly in 2026 can look different in 2027.

• Doctors and specialists. Call each provider's office or search the plan's 2027 online directory to confirm they will still be in-network. Ask specifically about 2027, since contracts can change on January 1.
• Hospitals. Chula Vista residents often use Sharp Chula Vista, Scripps Mercy Chula Vista and nearby San Diego systems. Confirm your preferred hospital is in the plan's 2027 network.
• Prescriptions. Pull up your medication list and check each drug against the plan's 2027 formulary. Note the tier, any prior authorization or step therapy, and whether your pharmacy is still a preferred pharmacy.
• Extra benefits you actually use. Dental allowances, hearing aids, transportation and OTC cards are the pieces most likely to shift.

The easiest place to run all of this at once is the Medicare Plan Finder at medicare.gov, where you can enter your ZIP code, your drugs and your pharmacy and see each plan's 2027 details side by side.

How many Medicare Advantage plans are available in San Diego County for 2027?

Chula Vista is in San Diego County, where 17 carriers offer 93 Medicare Advantage plans for the 2026 plan year, according to the CMS Medicare Advantage Landscape Source File. Of those, 68 are HMOs, 16 are HMO-POS plans and 9 are PPOs; 87 include drug coverage and 33 are Special Needs Plans for people with specific chronic conditions, dual Medicare-Medicaid eligibility or similar circumstances. CMS posts the 2027 county lineup in early October, and it becomes shoppable on the Plan Finder once the enrollment window opens.

The carriers serving San Diego County are Aetna (CVS Health), Alignment Health Plan, Astiva Health, Blue Shield of California, Centene (WellCare), Central Health Medicare Plan, Champion Health Plan, Clever Care Health Plan, Community Health Group, Elevance Health (Anthem), Humana, Imperial Health Plan of California, Kaiser Permanente, Molina Healthcare of California, SCAN Health Plan, Sharp Health Plan and UnitedHealthcare. The table below lists every plan each carrier offers in the county so you can see at a glance what is in the market before you narrow things down.

What is changing about Part D drug coverage in 2027?

Two Part D numbers are already confirmed for 2027 and will show up in your ANOC. The out-of-pocket cap on covered Part D drugs rises to $2,400 in 2027 (up from $2,100 in 2026), and the maximum allowable Part D deductible rises to $700 (up from $615 in 2026). The coverage gap — the old "donut hole" — has been gone since 2025, so Part D now runs through three phases: deductible, initial coverage and catastrophic (where you pay nothing more for the rest of the year once you hit the cap).

If paying drug costs in a single month would be hard, ask about the Medicare Prescription Payment Plan, which lets you spread your out-of-pocket drug costs across the calendar year in monthly bills from your plan.

What about Part B premiums and IRMAA for 2027?

CMS has not yet announced the 2027 Part B standard premium or deductible, or the 2027 IRMAA income brackets. Those figures are published later in the fall, usually in November. Watch medicare.gov for the official announcement rather than relying on projections.

For reference, IRMAA — the income-related surcharge on Part B and Part D — begins above $109,000 in income for a single filer in 2026. The 2027 thresholds will shift when CMS releases them.

What is the December 7 deadline, exactly?

December 7, 2026 is the last day of the Annual Enrollment Period for 2027 coverage. Any change you make between October 15 and December 7 takes effect January 1, 2027. After December 7, your choices are more limited: Medicare Advantage enrollees get one more switch during the Medicare Advantage Open Enrollment Period, January 1 – March 31, 2027. Outside of these windows you generally need a Special Enrollment Period triggered by a life event like moving or losing other coverage.

A few housekeeping tips while you compare: Medicare does not call, text or email you out of the blue to ask for your Medicare number. Legitimate help comes from medicare.gov, 1-800-MEDICARE (TTY 1-877-486-2048), or a licensed agent you contacted yourself.