Retirees can shop for new health plans during Medicare Advantage open enrollment. Here

Although a broader window for Medicare enrollment has closed, some retirees have another opportunity to make changes to their coverage.

Medicare Advantage open enrollment is available from Jan. 1 through March 31.

Medicare Advantage plans are offered by private insurers as an alternative to original Medicare. Generally, Medicare Advantage may cover Medicare Parts A and B, as well as Medicare Part D prescription drug coverage and other potential extra benefits.

During this open enrollment period, individuals who are already enrolled in a Medicare Advantage plan may switch to another Medicare Advantage plan. Alternatively, they may drop their current Medicare Advantage plan and opt for Medicare original coverage.

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To be sure, there will be more options later in the year during a broader open enrollment period that lasts from October to December, when Medicare original enrollees may also opt to change plans.

For beneficiaries who are eligible to make changes during this time, it’s important not to ignore this window, according to Juliette Cubanski, deputy director of the program on Medicare policy at KFF, a provider of health policy research.

“Plans can change considerably from one year to the next,” Cubanski said. “If people don’t compare their coverage to other options, they may not know that they’re going to be faced with higher costs.”

To be sure, Medicare Advantage plans have received negative attention because in some cases coverage was denied for necessary care.

Medicare Advantage plans are more likely than traditional Medicare to use prior authorization, approval needed before a patient can receive certain services or medications. However, because prior authorizations that have been denied are frequently overturned when they are appealed, that has prompted questions as to whether the plans are avoiding coverage obligations.

Medicare Advantage plans are more likely than original Medicare to offer extra benefits — such as dental, vision and hearing — that elderly beneficiaries need.

Most Medicare beneficiaries — 83% — consider supplemental benefits to be important to their coverage, according to a recent survey from The Commonwealth Fund, a provider of independent research on health care issues.

Notably, a larger share of Medicare Advantage enrollees — 89% — said supplemental benefits are important to them, versus 74% of traditional Medicare enrollees, The Commonwealth Fund found.

“People on Medicare, both older adults and those with disabilities, generally really need dental, hearing and vision services, as well as other benefits that are typically offered by Medicare Advantage plans,” said Gretchen Jacobson, vice president of Medicare at The Commonwealth Fund.

Beneficiaries who are in traditional Medicare may not have coverage for those same services unless they are able to purchase a supplemental plan or they qualify for Medicaid, Jacobson said.

State-based organizations — the State Health Insurance Program, or SHIP — provide assistance to Medicare beneficiaries to help sort through their plan options.

Unlike insurance brokers or other professionals, these organizations do not have a financial interest to sign people up for certain plans, Cubanski said.