Medicare Document Gathering Tool

Key takeaway: Walking into a Medicare enrollment conversation without your documents is like going to the DMV without your license — you'll likely have to come back, and time-sensitive enrollment windows won't wait.

What this helps you decide

• Which specific documents you need based on your situation — first-time enrollment, plan switch, or income-based assistance
• Whether you have proof of your Part B enrollment date, which determines your Medigap Open Enrollment Period eligibility
• Whether your income documentation is current enough for IRMAA and Medicare Savings Program determinations
• What to bring to a meeting with a licensed agent so you can make a final decision in one sitting

Who this is for

• People turning 65 who are enrolling in Medicare for the first time and aren't sure what paperwork is required
• People switching from Medicare Advantage back to Original Medicare, especially those planning to buy a Medigap policy
• People with lower incomes who think they might qualify for a Medicare Savings Program but don't know what proof to gather
• Caregivers assembling documents for a loved one, especially one who is disorganized or dealing with a health crisis

Example results

Example 1: Person turning 65 and enrolling in Medicare for the first time. This is a fresh start, and the document list is the most comprehensive. You'll need your Social Security card or number (Medicare uses this to identify your account), the red-white-and-blue Medicare card you'll receive in the mail about three months before your 65th birthday, and your current insurance cards if you have coverage through an employer or a spouse's employer. You'll also need a list of your doctors with their full addresses and NPI numbers if possible, a complete medication list with drug names, dosages, and frequencies, and your most recent tax return — Medicare uses income from two years prior to calculate IRMAA surcharges on Part B and Part D. If you were not born in the United States, have your birth certificate or naturalization certificate ready. Total document count: roughly 7–10 items depending on your situation.

Example 2: Person switching from Medicare Advantage back to Original Medicare and buying a Medigap policy. This situation has a specific urgency: if you're leaving an MA plan within your first 12 months of enrollment, you have guaranteed issue rights to buy certain Medigap policies without medical underwriting. You'll need your current MA plan ID card with the plan name and member ID, your original Medicare card showing your Part B effective date (this establishes your Medigap eligibility window), a current list of doctors you want to keep, your full medication list to compare Part D plans, and a realistic monthly budget for Medigap premiums. In 2026, Plan G averages $165.85 per month and covers virtually everything except the $283 Part B deductible. Plan N averages $122.98 per month with copays up to $20 for office visits and $50 for ER visits.

Example 3: Person applying for a Medicare Savings Program. The document list here focuses on income and assets, not medical history. You'll need proof of income from every source — your Social Security award letter or most recent benefit statement, any pension or annuity statements, and W-2s or 1099s if you have earned income. You'll also need bank statements for all checking and savings accounts (typically the most recent 2–3 months), statements for any investment accounts, your Medicare card, and a government-issued photo ID. If you own a home, you don't need to document it — primary residence is excluded from asset calculations for all four Medicare Savings Programs. If your income is at or below $1,350 per month as an individual, you may qualify for QMB, which covers your Part B premium of $202.90 per month, your deductibles, coinsurance, and copays.

Sample scenarios

Scenario	Input	Result
First-time Medicare enrollee at 65	Turning 65, leaving employer coverage, 3 doctors, 4 medications	Needs: Medicare card, Social Security number, insurance cards, doctor list, med list, 2 years of tax returns for IRMAA check
Switching from MA to Original Medicare + Medigap	Within first 12 months of MA enrollment, wants to return to fee-for-service	Needs: MA card, Medicare card with Part B date, medication list, budget for Medigap ($122.98–$165.85/mo for Plans N/G in 2026)
Applying for Medicare Savings Program	Individual income $1,200/mo, $5,000 in savings, no pension	Needs: Social Security statement, bank statements, Medicare card, photo ID. Likely qualifies for QMB (income below $1,350/mo threshold)
Caregiver organizing documents for a parent	Parent has dementia, multiple doctors, no organized records	Needs POA paperwork first, then: Medicare card, medication list from pharmacy, tax return, Social Security statement

What to do next

1. Pull your Medicare card or Social Security record first. Your Medicare card shows your Part A and Part B effective dates — information that affects your Medigap eligibility window, IRMAA lookback period, and late enrollment penalty calculations. If you don't have your card, log in to MySocialSecurity.gov or call 1-800-MEDICARE (1-800-633-4227). Your Part B effective date is on the card.
2. Gather two years of tax returns. Medicare looks at your Modified Adjusted Gross Income from two years prior to set your Part B and Part D premiums. For 2026 coverage, that means your 2024 tax return matters. If your income dropped significantly since then — due to retirement, a life-changing event, or a one-time income spike — you can request a reconsideration using IRS Form SSA-44. This is worth doing if IRMAA is adding $70 or more to your monthly premium.
3. Create a master medication list before any enrollment meeting. Don't rely on memory. Ask your pharmacist to print everything filled in the last 12 months. For each drug, confirm the name (brand and generic), the dose, and how many times a day you take it. This list is what agents and plan comparison tools use to check formularies and estimate your true annual drug costs — which can vary by hundreds of dollars between plans.
4. Organize everything in one folder before your agent meeting. Having your documents in order before you sit down to compare plans can cut the enrollment process in half. Put originals in a file folder and make photocopies or phone photos for your own backup. Include the Medicare card, insurance cards, medication list, doctor list with addresses, and income documents. If you're applying for a Medicare Savings Program, add bank statements and your Social Security benefit letter.

Key facts

• Having your documents organized before meeting with an agent can cut enrollment time in half — and helps ensure you don't miss a deadline because you're waiting on paperwork.
• Your most recent tax return is needed because Medicare uses income from two years prior to determine IRMAA surcharges on Part B and Part D premiums. For 2026, the base Part B premium is $202.90 per month, but IRMAA can add anywhere from $70.00 to $443.90 per month depending on income.
• A complete medication list should include drug name, dosage, frequency, and prescribing doctor. This is the single most important document for comparing Part D drug plans and Medicare Advantage formularies accurately.

Related decisions

• Caregiver checklist — assess your readiness to help a loved one with Medicare decisions
• When should I sign up for Medicare — understand your enrollment windows
• IRMAA calculator — see if your income affects your Part B or Part D premium
• Medicare Savings Program — check if you qualify for help paying Medicare costs