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.

More from Personal Finance:
How IRS layoffs could impact your tax filing, refund
As tariffs ramp up, here’s an investment option
DOGE’s FDIC firings put banking system at risk

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.

A federal judge in Maryland on Monday granted a temporary restraining order barring staffers from Elon Musk‘s secretive government-slashing effort, the Department of Government Efficiency, from accessing the personal information of millions of student loan borrowers.

The order, issued by Judge Deborah Boardman, ruled that the Department of Education and the Office of Personnel Management — the government’s HR department — must stop sharing federal employees’ and student borrowers’ personal data with DOGE officials. It marks a significant limitation on DOGE’s access to Americans’ personal data.

Boardman’s order bars DOGE from the personal information at the Education Department until March 10 at 8 a.m.

More from Personal Finance:
Converting your home to a rental could trigger a ‘tax bomb’ when you sell
What the privatization of Fannie Mae, Freddie Mac may mean for homebuyers, investors
U.S. appeals court blocks Biden SAVE plan for student loans

Workers for DOGE have entered government offices in recent weeks, looking to make deep cuts to federal spending.

Boardman’s order came in response to a lawsuit led by The American Federation of Teachers, a union representing 1.8 million members. The AFT sued several federal agencies, including the Education Department, for permitting DOGE access to individuals’ private data.

AFT president Randi Weingarten applauded Boardman’s decision.

“When people give their financial and other personal information to the federal government — namely to secure financial aid for their kids to go to college, or to get a student loan — they expect that data to be protected and used for the reasons it was intended,” Weingarten said.

The White House did not immediately respond to a request from CNBC for comment.

There are currently six DOGE “affiliates” working at the Education Department, according to the court order. DOGE has claimed that it needed access to student loan programs to investigate waste, fraud and abuse, Boardman said.

However, the judge said the order that the government didn’t explain why DOGE affiliates at the Education Department “need such comprehensive, sweeping access to the plaintiffs’ records to audit student loan programs.”

Boardman expressed concern that DOGE had access to people’s income information and Social Security numbers.

And she wrote that the plaintiffs would likely be successful in their claim that the Education Department’s disclosure of their records to DOGE staffers violates The Privacy Act, a federal law that applies to federal agencies and is meant to protect individuals’ personal information.

“The data in question includes really sensitive information on a population of people who had to give that information for one clear purpose: borrow money to get an education,” said Ben Winters, the director of artificial intelligence and privacy at the Consumer Federation of America.

“It’s crucial that institutions like governments only allow your data to be used for strictly the purpose you gave it for,” Winters said.

The Trump administration’s tariff policies may raise auto insurance premiums for motorists, according to a new Insurify analysis. This at a time when drivers continue to see costs soar amid pandemic-era inflation.

A 25% tariff on imports from Canada and Mexico — which may take effect as soon as March — would increase annual full-coverage car insurance premiums by 8% to $2,502, on average, by the end of 2025, according to Insurify.

It estimates average annual premiums would rise 5% by year-end, to $2,435, without tariffs on Canada and Mexico.

Tariffs are expected to make cars and auto parts imported from Canada and Mexico — which are major suppliers for the U.S. market — more expensive. As a result, insurers pay out more money in claims when policyholders get into car accidents, and they pass on that financial risk to consumers via higher premiums.

More from Personal Finance:
How the U.S. has used tariffs throughout history
What the ‘mother of all trade wars’ can teach us about U.S. tariffs
As tariffs ramp up, this investment can protect against inflation

“When people think about tariffs, they typically think about goods they might get from somewhere else,” said Matt Brannon, a data journalist at Insurify who authored the analysis. “Many times, we don’t think about services like car insurance.”

He called the estimates of tariff impact “conservative.”

Trump imposed a 10% additional tariff on all imports from China, starting on Feb. 4. Across-the-board tariffs on Canada and Mexico were also set to take effect that day, before the White House delayed them by a month.

About six out of every 10 auto replacement parts used in U.S. auto shop repairs are imported from Mexico, Canada and China, according to the American Property Casualty Insurance Association. Some car components cross the border multiple times before final assembly.

Trump also signed a sweeping plan for retaliatory tariffs on global trading partners, after a review set to be completed by early April. He signed an order to raise duties on aluminum and steel to 25%, up from 10%, and called for a 25% tariff on automobiles, pharmaceuticals and semiconductors.

Economists don’t necessarily expect all tariffs to take effect. Trump may be wielding them as a tool to extract concessions from trading partners, they said.

“However, using tariffs as a negotiation tool doesn’t mean no imposition of tariffs,” Bank of America Securities economists wrote Friday in a research note. Those experts don’t anticipate Canada or Mexico tariffs will come to pass.

However, if they do, they’d likely exacerbate already soaring premiums for cars, parts and insurance premiums, experts said.

“Threats of 25% tariffs on the North American borders — proposed, now delayed — would disrupt more than three decades of free trade across North America and rattle every corner of the automobile business, while proposed ‘reciprocal’ tariffs would add further price pressure to an auto industry already facing affordability issues,” Cox Automotive wrote in a recent commentary.

Motor vehicle insurance premiums are up by 12% in the past year, according to the consumer price index.

Insurance costs began to rise quickly in 2022 and 2023 as Americans worked from home less often and commuted to work more frequently, Brannon said.

“A lot more people hit the road at the same time, which led to more accidents,” he said.