California Medigap Birthday Rule 2027: A 60-Day Plan-Switch Checklist

California gives many people who already have a Medicare Supplement policy, commonly called Medigap, a yearly chance to compare coverage around their birthday. The Birthday Rule can be useful in 2027 when premiums or needs change, but its timing and limits matter.

What the rule allows

The rule generally provides a 60-day open enrollment period beginning on your birthday. A person with an existing Medigap policy may apply for a policy with equal or lesser benefits. Eligible applicants do not face medical underwriting or a new pre-existing-condition waiting period under this rule.

What it does not promise

It does not guarantee every carrier, plan design, or price. It does not by itself allow a move to richer benefits. It is also different from the fall Medicare Annual Enrollment Period and does not automatically apply to someone with only Medicare Advantage coverage.

Your birthday checklist

1. Mark the 60 days beginning on your birthday; insurers generally send advance notice.
2. Save your current plan letter, benefits, premium, and effective date.
3. Compare equal or lesser-benefit choices and ask about premiums.
4. Confirm eligibility and the replacement effective date with the carrier or a licensed agent.
5. Do not cancel your current policy until the replacement is confirmed.
6. Review Part D separately because Medigap does not cover retail prescription drugs.

See our guide to Medigap timing in 2027, or contact Skyline Benefit to organize your review questions.

Source: California Department of Insurance. Educational only; availability, eligibility, and pricing are determined by the insurer and applicable law.

A practical switch example

Suppose your current Medigap policy has benefits that meet your needs but its premium has increased. Before your birthday, collect the policy letter and compare plans with the same or lower benefits. During the 60-day period starting on your birthday, ask a carrier or licensed agent whether the replacement qualifies under the Birthday Rule. Do not assume a lower advertised premium represents the same benefits, household discount, or future rate pattern.

Questions to bring to the comparison

• Is the replacement policy equal to or lower in benefits than my current policy?
• What is the first premium, and how has the carrier changed rates for comparable policies?
• What date will the replacement take effect?
• Will I keep Original Medicare and my separate Part D drug coverage?
• What documentation does the carrier need to apply the Birthday Rule?

Frequently asked questions

Can I use the Birthday Rule to switch from Medicare Advantage to Medigap?

Not by itself. The rule is for people who already have a Medigap policy. A Medicare Advantage member may have other enrollment or guaranteed-issue rights in particular situations, but should verify them separately.

Is the 60-day period the same for everyone?

It generally begins on your birthday, not when a notice arrives. Start comparing early so there is time to confirm eligibility and an effective date.

Does this rule make Part D changes automatically?

No. Part D is separate and must be reviewed under its own enrollment rules.