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The choice that actually matters here is which hospital system you can use — start there, not with the premium.
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San Diego County is one of the most competitive Medicare Advantage markets in the country, with plenty of $0-premium plans — which is exactly why the decision here should start with your doctors and hospital system, not the premium. Scripps, Sharp, UC San Diego Health, Palomar, and Kaiser each contract with a different mix of plans, and Scripps in particular has moved in and out of Medicare Advantage contracts in recent years, stranding patients mid-treatment. Original Medicare plus a Medigap supplement costs more monthly (roughly $150–$350 for a Plan G, plus a Part D drug plan) but works at any provider nationwide with no referrals and no prior authorization. The catch that traps people: you have a guaranteed right to buy a Medigap policy during the six months after your Part B starts, and after that California insurers can medically underwrite and decline you — so switching from Advantage to Supplement later is often impossible. For free, unbiased, commission-free counseling, use HICAP, California's Health Insurance Counseling and Advocacy Program, which serves San Diego County at no charge.
| Feature | Advantage (Part C) | Original + Medigap |
|---|---|---|
| Typical monthly premium | $0–$100 plus Part B | Part B + $150–$350 Medigap + Part D |
| Provider choice | Network only, county-based | Any provider that takes Medicare, nationwide |
| Referrals / prior auth | Common | Rare to none |
| Out-of-pocket max | Yes, capped annually | Effectively none needed with Plan G |
| Travel and snowbird coverage | Emergency only outside network | Works anywhere in the US |
| Drug coverage | Usually built in | Separate Part D plan required |
| Dental / vision / gym extras | Frequently included | Not included; buy separately |
| Can you be turned down later? | No, always open at enrollment periods | Yes, after the 6-month Medigap window |
| Network stability risk | Hospital systems drop plans | Not applicable |
Large presence across La Jolla, Encinitas, Chula Vista, and Hillcrest. Scripps has publicly restructured its Medicare Advantage participation in recent years. If your cardiologist or oncologist is at Scripps, confirm plan participation in writing for the coming year before you enroll.
Sharp runs its own health plan and a very large affiliated medical group, and is generally the deepest Advantage participant in the county, with hospitals in Kearny Mesa, Chula Vista, La Mesa, and Coronado.
The academic center — Hillcrest, La Jolla, and the Moores Cancer Center. If you need specialized cancer, transplant, or complex neurology care, verify access. Original Medicare plus Medigap guarantees it.
A closed integrated system with its own Advantage plan. Excellent coordination and simple billing if you are comfortable staying entirely inside Kaiser, including its San Diego Medical Center in Kearny Mesa.
The North County inland and coastal safety-net hospitals. Plan networks differ noticeably between North County and the central city — a plan that is strong downtown may be thin in Escondido or Fallbrook.
In Advantage plans you are usually assigned to a medical group, not just a plan. Ask your physician's office which specific plan and medical group combination keeps you with them for the coming year.
Seven months around your 65th birthday — three before, your birthday month, and three after. Missing Part B without other creditable coverage creates a permanent 10%-per-year penalty.
The most consequential deadline in Medicare. For six months after your Part B begins, insurers must sell you any Medigap policy regardless of health. After it closes, California allows medical underwriting and you can be declined.
Change Advantage plans or Part D drug plans for January 1. Every plan mails an Annual Notice of Change each September — read the two pages listing what changed, especially the drug formulary and the provider network.
If you are already in an Advantage plan you get one chance to switch to another Advantage plan or return to Original Medicare. Returning does not guarantee you a Medigap policy.
A genuine local advantage: California lets Medigap policyholders switch to an equal or lesser benefit plan with any carrier during a window around their birthday each year, without underwriting. Use it to reprice your coverage annually.
Moving into or out of San Diego County, losing employer coverage, qualifying for Medi-Cal, or your plan leaving the area all open a special window. Document the qualifying event.
The Health Insurance Counseling and Advocacy Program provides free one-on-one Medicare counseling, and its counselors are prohibited from selling anything. Serving San Diego County, this is the first call to make.
The county's Area Agency on Aging connects Medicare questions to benefits screening for Medi-Cal, Medicare Savings Programs, and Extra Help with drug costs.
If income is modest, these programs can pay your Part B premium and dramatically cut drug costs. Many eligible San Diegans never apply. Screening takes one appointment.
On medicare.gov, enter your actual medication list and preferred pharmacy. Total annual drug cost varies by thousands between plans with identical premiums — this tool is the only way to see it.
Independent brokers are paid commissions by the plans they sell, which are similar across most Advantage plans but generally not paid at all on Medigap-only sales in the same way. A good broker is genuinely useful; ask which carriers they are appointed with.
The volume of Medicare marketing in this county is extraordinary between October and December. Nothing you receive unsolicited should drive a decision about which hospital system you can use for the rest of your life.
It depends on which doctors and hospitals you need. San Diego has an unusually rich Advantage market with many $0-premium plans and dental and vision extras, but networks are county-bound and hospital systems have dropped plans mid-year in the past. Original Medicare plus a Medigap Plan G costs more each month and requires a separate Part D plan, but works at Scripps, Sharp, UC San Diego, and anywhere else in the country with no referrals.
Scripps Health has restructured its Medicare Advantage participation in recent years and the contracted plan list changes. Before enrolling, confirm the specific plan and plan year directly with both Scripps and the insurer. Original Medicare is accepted regardless.
California allows anyone with a Medigap policy to switch to another carrier's plan with equal or lesser benefits during a window each year around their birthday, with no medical underwriting. It is a state protection most other states lack, and it lets you shop your supplement price annually.
Sometimes, but not reliably. Your guaranteed right to buy a Medigap policy lasts six months from when Part B starts. After that, California insurers can medically underwrite and decline you, with limited exceptions such as a trial right in your first year on Advantage. Treat the initial decision as long-term.
HICAP — the Health Insurance Counseling and Advocacy Program — offers free one-on-one counseling and cannot sell insurance. County Aging & Independence Services can also screen you for Medicare Savings Programs and Extra Help with prescription costs.
Annual Enrollment runs October 15 to December 7 for changes effective January 1. If you already have an Advantage plan, Medicare Advantage Open Enrollment from January 1 to March 31 gives one additional switch. Moving, losing employer coverage, or qualifying for Medi-Cal can open a Special Enrollment Period.
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Written and fact-checked by the Sandi Spots Editorial team — San Diego residents publishing under Sleep Coast LLC. Every place we recommend has been visited in person or verified against an official source, and no business can pay for inclusion or a higher ranking. Last updated .