Basics of Medicare and Enrollment Periods

Pam Morton • February 15, 2025

Medicare Part A, B, C & D

During Medicare's open enrollment period, which runs from Oct. 15 to Dec. 7, beneficiaries — seniors, younger people with disabilities and individuals with end-stage renal disease — can choose plans for next year. Options include traditional Medicare from the government or a wide array of Medicare Advantage plans, which are private insurance products that encompass similar benefits.


The parts of Medicare


Medicare has four main components:

  • Part A is hospital insurance. You don't usually pay a monthly premium for Part A if you or your spouse paid Medicare taxes while working.
  • Part B is medical insurance.
  • Part C is Medicare Advantage — private plans that use managed care models, such as HMOs and PPOs.
  • Part D is prescription drug coverage.


In general, you are automatically enrolled in Part A and Part B at age 65. Many enrollees find they need extra insurance and sign up for Medicare Supplement Insurance, also known as Medigap. Medigap is purchased from a private health insurance company and helps cover out-of-pocket expenses like copayments, coinsurance and deductibles.


Medigap rules can be restrictive and complex. Your best chance to get Medigap is when you first join Medicare as a senior, after you turn 65. You have a six-month window when you can buy a Medigap policy and insurers can't turn you down or charge you more because of your health conditions.


Medicare Advantage — be careful


Medicare Advantage can be useful, but it's not always perfect. Among the disadvantages of Medicare Advantage are limited networks, requirements for prior approval, delays and denials. You can switch from Medicare Advantage back to the original Medicare during open enrollment or the Medicare Advantage open enrollment window.


Your drug coverage can come through a stand-alone Part D plan, needed if you are in traditional Medicare, or included as part of Medicare Advantage. Use Medicare.gov to see if your prescriptions are included.


If you missed your Part B enrollment window — three months before your 65th birthday and three months after — you'll face a late enrollment penalty when you sign up. The penalty equals 10% of the standard monthly premium for each 12-month period you delayed enrollment. You also may have to pay a late enrollment penalty if you didn't sign up for Part D or if your prescription drug coverage didn't meet Medicare's minimum standard. You may not be taking prescription drugs now, but consider signing up for a Medicare drug plan or a Medicare Advantage plan with drug coverage to avoid a penalty later.


Medicare has an online tool that makes it easier to comparison shop. Log in to Medicare.gov and select the link for "Find health & drug plans." Also, you can get guidance from Medicare by calling 1-800-633-4227. You can turn to a broker, a navigator or an enrollment counselor for help.


If you're at that time of life, let us know how we can help you make a smooth transition. Give us a call at Benefits by Design Insurance Services or send us an email to schedule a time to talk and we'll be happy to help you get ready for Medicare. Our phone numbers are 760-696-3573 in Carlsbad or 415-524-8959 in Larkspur, California. You can also email us at admin@benefitsbydesignca.com.


Copyright 2024 Industry Newsletters

By Pam Morton April 1, 2026
When people sign up for a new health insurance plan—whether it’s an employer-sponsored plan or one purchased through the Affordable Care Act (ACA) exchange—they are often confused about when coverage starts, what services are covered, and how much they will need to share in the cost of care. The Kaiser Family Foundation recently compiled a list of seven takeaways from stories about people who ended up paying large out-of-pocket expenses for medical care. Reviewing these tips can help health plan enrollees better understand their coverage and avoid unexpected financial surprises. 1. Most insurance coverage doesn’t start immediately Many new plans include waiting periods, so it’s important to maintain continuous coverage until your new plan takes effect. Usually, health insurance starts on the first of the month and ends on the last day of the month. There are special circumstances when someone loses job-based health coverage. In that case, they may elect COBRA or purchase a plan through the ACA marketplace. With COBRA, once payment is made, coverage applies retroactively—even for care received while someone was temporarily uninsured. Losing employer coverage qualifies someone for an ACA Special Enrollment Period , which generally allows them to enroll in a Marketplace plan up to 60 days before or 60 days after their employer coverage ends. If someone enrolls before their job-based coverage ends, their new plan can usually begin right away and help prevent a gap in coverage. If someone enrolls after their job-based coverage ends, Marketplace coverage usually begins on the first day of the month after enrollment, so they could experience a short coverage gap before the new plan starts. 2. Check coverage before checking in Some health plans include restrictions that may not be obvious at first. These restrictions can affect coverage for services such as contraception, immunizations, and cancer screenings. Before receiving care, enrollees should contact their insurance company (or for job-based insurance, their human resources or retiree benefits office) to confirm coverage. Ask whether there are exclusions for the care you need, whether there are limits per day or per policy period, and what out-of-pocket costs you should expect. 3. “Covered” doesn’t always mean insurance will pay right away It’s important to read the fine print about network gap exceptions, prior authorizations, and other insurance approvals. These requirements may apply only to certain doctors, services, or dates. In addition, even if a service is covered, the insurance company may not pay for it until you have met your deductible or other cost-sharing requirements. 4. Get estimates for non-emergency procedures Before scheduling a non-emergency procedure, patients may be able to compare prices among different providers. Request written estimates whenever possible. If the cost seems too high, it may be possible to negotiate the price before receiving care, or find an alternate provider. 5. Location matters The cost of care can vary significantly depending on where services are performed. For example, if blood work is required, ask your doctor to send the order to an in-network lab. Sometimes a doctor’s office affiliated with a hospital system will automatically send samples to a hospital lab, which may result in higher charges if the lab is out of network. 6. When hospitalized, contact the billing office early If you or a loved one is admitted to the hospital, speaking with a billing representative early in the process can help prevent confusion later. Consider asking questions such as: Has the patient been fully admitted, or are they under observation status? Has the care been classified as “medically necessary”? If a transfer to another facility is recommended, is the ambulance service in-network—or can one be selected? 7. Ask for a discount Medical charges are often higher than the rates insurers typically pay, and providers frequently expect some level of negotiation. Patients may also be able to negotiate their own bills. In addition, uninsured or underinsured patients may qualify for self-pay discounts or financial assistance programs such as charity care. If you need assistance with your health insurance in California, contact Benefits By Design Insurance Services in San Diego. www.benefitsbydesignca.com or email admin@benefitsbydesignca.com.
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