How do the different parts of Medicare work together?

Quick Answer

Medicare is divided into parts that cover different things. Part A covers hospital stays, Part B covers doctors and outpatient care, Part C is Medicare Advantage (a private plan alternative), and Part D covers prescription drugs.

Detailed Explanation

Original Medicare is made up of two parts. Part A covers inpatient hospital stays, skilled nursing facility care after a qualifying hospital stay, hospice, and some home health services. Most people don't pay a monthly premium for Part A because it's based on your work history. Part B covers outpatient care, meaning doctor visits, lab tests, preventive services, and medical equipment. Part B does have a monthly premium.Together, Parts A and B form the foundation. But they don't cover everything, and they come with cost-sharing, which means deductibles and coinsurance you pay out of pocket. Many people add coverage to fill those gaps.Part C, known as Medicare Advantage, is an alternative way to get your Medicare benefits. Instead of using Parts A and B directly through the federal government, you enroll in a private insurance plan that is approved by Medicare. These plans often include drug coverage and sometimes offer extras like dental or vision. The tradeoff is that they typically have networks of preferred providers.Part D is standalone prescription drug coverage. You can add it to Original Medicare, and it's often built into Medicare Advantage plans.Some people also buy a Medigap policy, which is supplemental insurance that helps cover the cost-sharing gaps in Original Medicare. Medigap works alongside Parts A and B but cannot be used with Medicare Advantage.The parts don't all have to be used together in the same way. Your combination depends on your health needs, your finances, and which doctors and medications matter most to you.

How This Applies in Utah

What This Means For You

For you, this means there's no single right way to set up Medicare coverage. The goal is to build a combination that fits your specific doctors, prescriptions, and budget.

Disclaimer

How Resting Sycamore Advisors Uses CMS Data

Our Commitment to Reliable Medicare Information

At Resting Sycamore Advisors, we work to provide accurate, current, and trustworthy information about Medicare Advantage, Medicare Part D, and Special Needs Plans.

To do that, we use data published by the Centers for Medicare & Medicaid Services (CMS), which is the official source for Medicare plan and enrollment information.

CMS Data Sources We Rely On

Our Medicare plan pages and comparison tools are powered by CMS datasets, including:

  • Medicare Advantage and Part D Landscape Files for annual plan availability and benefit details
  • Plan Benefits Package (PBP) Files for detailed benefit and coverage information
  • Part C and Part D Performance Data for quality ratings and plan performance measures
  • Monthly Enrollment Data for enrollment counts by contract, plan, state, and county

When possible, we link to the original CMS resources so you can review the source material directly.

How Often We Update Our Data

We follow the CMS release schedule and update our website as new data becomes available.

Annual Plan Year Updates (September)

We load new plan year Landscape and PBP files before the Medicare Annual Enrollment Period (October 15 through December 7). We also monitor CMS.gov for updates or revisions and refresh our content when needed.

Mid-Year Updates

We update enrollment and performance data as CMS publishes revised files, which are typically released monthly or quarterly.

Ongoing Maintenance

We routinely monitor CMS announcements for corrections, reissued files, or other changes and update our pages accordingly.

Each plan page includes a Last Accessed date so visitors can see when the source information was most recently reviewed.

How We Prepare CMS Data for Our Website

CMS data can be difficult to read in raw form. To make it easier to use, we format and organize the data for clarity.

This includes:

  • Standardizing plan identifiers such as contract ID, plan ID, and segment
  • Normalizing terminology so common Medicare terms are presented consistently
  • Organizing plan information by state, county, and ZIP code to match how people shop for coverage

All data values come from CMS. We do not change the underlying values beyond formatting, organization, and presentation.

Version Tracking and Transparency

We keep internal records of the CMS dataset versions used on our site.

Major Version History

  • Current Version: CY2025 Medicare Advantage and Part D Landscape Files (v1.0, published October 2025)
  • Prior Version: None. Resting Sycamore Advisors first began publishing structured Medicare plan information in March 2025

If CMS issues corrected or revised files, we update our website to reflect the latest available version.

Important Limitations

Please keep the following in mind:

  • CMS is the official source of truth. For enrollment and coverage decisions, always confirm details with Medicare.gov or 1-800-MEDICARE.
  • Data timing can vary. Enrollment and performance updates may appear on our website a few weeks after CMS publishes changes.
  • Plan details can change. Plan availability, costs, and benefits may change. Always verify current details directly with the plan provider.

Need Help From Official Medicare Resources?

For personalized Medicare assistance, please use these official resources:

  • Medicare.gov Help Center — https://www.medicare.gov
  • 1-800-MEDICARE (1-800-633-4227) TTY: 1-877-486-2048
  • State Health Insurance Assistance Program (SHIP) — free local counseling for Medicare beneficiariesIf you want, I can also give you a shorter legal-style version for a footer or /disclaimer page summary.