What Is Medicare Secondary Payer (MSP) and the Coverage You May Need
- William Pierce
- Apr 4
- 2 min read
When Medicare is not your primary insurance, it operates as a Medicare Secondary Payer (MSP). This means another insurance—such as an employer group health plan, workers’ compensation, or liability insurance—pays first, and Medicare covers some or all of the remaining costs. While this setup can reduce your out-of-pocket expenses, gaps in coverage may still exist.
If you are in this situation, Pierce Insurance recommends additional insurance coverages you may need to ensure full protection against unexpected healthcare costs:
1. Medicare Supplement Insurance (Medigap)
If Medicare is secondary, a Medigap policy may not be necessary while you have primary coverage, but it becomes essential when Medicare transitions to being your primary insurer. A Medigap plan helps cover costs such as deductibles, copayments, and coinsurance that Medicare doesn’t pay. If you anticipate losing employer coverage in the future, having a plan ready can prevent gaps in coverage.
2. Prescription Drug Coverage (Medicare Part D)
Many employer-sponsored plans include prescription drug coverage, but if your primary insurance does not offer comprehensive drug benefits, enrolling in a Medicare Part D plan is crucial. Even if your employer coverage is deemed creditable, having a Part D plan in place when Medicare becomes your primary insurance prevents late enrollment penalties and ensures continued access to medications.
3. Long-Term Care Insurance
Medicare and most employer health plans do not cover long-term care, such as nursing home stays or in-home caregiving for chronic conditions. If you have significant assets to protect, investing in long-term care insurance can provide financial security for extended care needs.
4. Hospital Indemnity Insurance
Even with both primary insurance and Medicare, hospital stays can be expensive due to deductibles, coinsurance, and extended care costs. A hospital indemnity insurance plan provides a cash benefit for each hospital admission or stay, helping to offset those costs.
5. Critical Illness and Cancer Insurance
While employer health insurance and Medicare cover a portion of treatment costs for serious illnesses like cancer, heart attacks, or strokes, there can be significant out-of-pocket expenses for specialized treatments, deductibles, and lost income. A critical illness or cancer insurance policy provides lump-sum payments to help with these unexpected costs.
6. Dental, Vision, and Hearing Coverage
Medicare does not typically cover routine dental, vision, or hearing care, and many employer-sponsored plans have limited benefits in these areas. Standalone dental, vision, and hearing insurance policies can help cover the costs of checkups, glasses, hearing aids, and major procedures.
Taking time to learn how Medicare Secondary Payer (MSP) rules impact your healthcare coverage is important in making informed insurance decisions. Whether your employer plan provides adequate coverage or you need supplemental policies, having the right insurance mix ensures you’re financially protected. If you’re unsure about your current coverage or how to plan for the future, speaking with a Medicare specialist can help you navigate your options.
Pierce Insurance, located in Ankeny, Iowa is experienced in navigating these situations. Call us today at (515) 257-6663 to see how we can help you today!

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