How to Get a Letter of Creditable Coverage for Medicare?

To get a letter of creditable coverage for Medicare, contact the employer, union, or insurance carrier that ran your previous prescription drug plan and ask for a written notice confirming whether that coverage was creditable for Medicare Part D. Medicare and the Social Security Administration do not issue these letters. The plan sponsor does, because federal law makes them responsible for telling Medicare-eligible members whether their drug coverage was at least as generous as standard Part D.1Centers for Medicare & Medicaid Services. Creditable Coverage

Who Actually Issues the Letter

A common misconception is that Medicare hands these letters out. It doesn’t. The entity that administered your prior drug coverage is the one on the hook for the disclosure, and knowing which entity that is saves time.

  • Employer or union plans. The Medicare Modernization Act requires employers and unions offering prescription drug coverage to notify Medicare-eligible members annually before October 15, and at other trigger points including when a person first joins the plan. If you kept the mailings, you may already have the letter you need.1Centers for Medicare & Medicaid Services. Creditable Coverage
  • Private insurance carriers. If your coverage came through an individual policy or COBRA, the insurer that ran the plan is the party responsible for issuing the disclosure.
  • Federal programs that automatically qualify. TRICARE counts as creditable prescription drug coverage automatically, so a TRICARE beneficiary who later enrolls in Part D does not face the penalty. Coverage under Medicaid, the VA, and the Federal Employees Health Benefits Program also qualifies as creditable under federal law.2TRICARE. Medicare-Eligible Beneficiaries3Office of the Law Revision Counsel. 42 U.S. Code 1395w-113 – Premiums; Late Enrollment Penalty

CMS publishes model notice templates that plan sponsors use or adapt when drafting their disclosures, so the letters you receive from different plans tend to look similar.4Centers for Medicare & Medicaid Services. Model Notice Letters

How to Request the Letter

Start With the Benefits Department

Call or email the HR or benefits team at the employer whose plan covered you. Ask specifically for a letter confirming whether your prescription drug coverage was creditable for Medicare Part D purposes. Have your policy or group number ready, along with the exact dates you were enrolled. Benefits staff generally know this request well, because they send the same notice out annually to Medicare-eligible members.1Centers for Medicare & Medicaid Services. Creditable Coverage

Contact the Insurance Carrier

If the employer is unresponsive or no longer in business, go directly to the insurer that administered the plan. Many carriers let you pull coverage verification through their member portal, usually under a documents or coverage history section. When no digital option exists, call the customer service number from your old insurance card and ask for a certificate confirming your prescription drug coverage dates and creditable status. Ask for a reference number so you can follow up.

Follow Up in Writing

When phone calls stall, send a written request to the carrier’s member services department. Include your full name as it appeared on the policy, the policy or group number, dates of coverage, Social Security number, and a clear return address. A written request creates a paper trail, which becomes useful if you later need to appeal a Medicare penalty.

If the Formal Letter Isn’t Available

Employers close. Insurers merge. Records get lost. When the formal disclosure can’t be produced, you can build a case from other documents. The Social Security Administration accepts several alternatives as evidence of prior qualifying coverage:5Social Security Administration. Evidence of GHP or LGHP Coverage Based on Current Employment Status

  • Pay stubs showing health insurance premium deductions
  • W-2 forms reflecting pre-tax medical contributions
  • Tax returns showing health insurance premiums paid
  • Insurance cards with a policy effective date
  • Explanation of Benefits statements from the plan
  • Receipts or statements reflecting premium payments

Gather as many of these as you can to cover the full period in question. Overlapping documents from the same months carry more weight than a single stub with a gap around it.

Part B Uses a Different Form

The creditable coverage letter answers Part D questions. If you delayed Medicare Part B because you had group health coverage through a current employer, that’s a separate proof, handled through Form CMS-L564. You fill out Section A with your personal information, hand it to your employer or former employer to complete Section B with your coverage dates and employment status, and submit it with your Part B application (Form CMS-40B) to your local Social Security office.6Centers for Medicare & Medicaid Services. CMS-L564: Request for Employment Information One detail catches people: coverage that qualifies for the Part B Special Enrollment Period must be based on current employment. COBRA, retiree health plans, VA coverage, and individual Marketplace plans do not count for that purpose.7Social Security Administration. How to Apply for Medicare Part B During Your Special Enrollment Period

Deadlines That Make the Letter Useful

The letter matters only if you use it in time.

  • Part B Special Enrollment Period. You have eight months from the date your employment ends or your employer coverage ends, whichever comes first, to sign up for Part B without a penalty.7Social Security Administration. How to Apply for Medicare Part B During Your Special Enrollment Period
  • Part D enrollment. You can enroll during your initial enrollment period (the seven-month window around your 65th birthday), during annual open enrollment from October 15 through December 7, or during a Special Enrollment Period triggered by losing other creditable drug coverage.
  • The 63-day rule. Going 63 or more consecutive days without creditable prescription drug coverage after your initial enrollment period ends is what triggers the Part D late enrollment penalty in the first place.8Centers for Medicare & Medicaid Services. Creditable Coverage and Late Enrollment Penalty

Using the Letter to Fight a Penalty You Already Have

If your Part D plan has already assessed a late enrollment penalty and you believe you had creditable coverage during the gap period, you can request reconsideration. The plan sends a written notice about the penalty along with an LEP Reconsideration Request Form. Fill it out, attach proof of prior creditable coverage, and submit it to the Independent Review Entity contracted by Medicare. The IRE generally issues a decision within 90 calendar days.9Centers for Medicare & Medicaid Services. Late Enrollment Penalty Appeals

Include any creditable coverage notices you received from former plans, insurance cards with effective dates, and any of the alternative documents listed above. A copy of a creditable coverage disclosure notice from a former employer or plan sponsor is particularly strong evidence, because that notice exists specifically to satisfy the federal requirement that the plan tell you whether the coverage was creditable.10Centers for Medicare & Medicaid Services. Partner Tip Sheet: The Part D Late Enrollment Penalty The penalty attaches to your premium for as long as you have Part D, so pursuing reconsideration is worth the effort even when your documentation is incomplete.