For many older Americans, understanding how to use both UnitedHealth insurance and Medicare together can be confusing. But if done right, it can give you much better coverage, lower out-of-pocket costs, and peace of mind.
Here’s a complete breakdown of what happens when you have both UnitedHealth and Medicare—and how to make the most of it.
What Is Medicare?
Medicare is a federal health insurance program run by the Centers for Medicare & Medicaid Services (CMS). It is mostly for people aged 65 and older, though some younger people with disabilities can also qualify.
Medicare is divided into different parts:
- Part A – Hospital insurance (inpatient stays)
- Part B – Medical insurance (doctor visits, outpatient care)
- Part C (Medicare Advantage) – Combines Part A and B, often with extra benefits
- Part D – Prescription drug coverage
You can apply for Medicare through the Social Security Administration (SSA). Learn more or enroll at: https://www.ssa.gov/medicare/
What Is UnitedHealth?
UnitedHealth Group, through its UnitedHealthcare brand, is one of the largest private health insurance companies in the U.S. They offer:
- Medicare Advantage (Part C) Plans
- Medicare Supplement Insurance (Medigap)
- Part D Drug Plans
- Employer and individual health insurance
UnitedHealth works closely with Medicare to offer private Medicare plans.
What Happens When You Have Both?
If you’re enrolled in Medicare and choose a plan from UnitedHealth (like a Medicare Advantage or Medigap plan), here’s what happens:
1. Medicare Is Still Your Primary Coverage
- Medicare Part A and Part B handle your basic hospital and doctor costs.
- UnitedHealth works on top of Medicare to cover what’s left or offer extras.
2. Lower Out-of-Pocket Costs
- If you pick a Medicare Advantage Plan from UnitedHealth, you might pay lower monthly premiums than with Medigap.
- Some plans also limit your maximum yearly spending, protecting you from big hospital bills.
3. Added Benefits Beyond Medicare
UnitedHealth’s Medicare Advantage plans may include:
- Dental, vision, and hearing benefits
- Fitness memberships (like SilverSneakers)
- Transportation to medical appointments
- OTC drug allowances
These extras aren’t covered by Original Medicare.
4. Prescription Drug Coverage Included
If you choose a Part C plan from UnitedHealth, it often bundles Part D coverage, so you don’t need to buy a separate prescription drug plan.
What You Need to Be Careful About?

While this setup can be helpful, there are a few things you should watch for:
❗ Network Restrictions
Some UnitedHealth Medicare Advantage plans have limited doctor networks. Make sure your doctor is covered.
❗ Prior Authorizations
Certain procedures or medications may need pre-approval.
❗ Can’t Combine Medigap with Advantage
If you choose a Medicare Advantage Plan (like those from UnitedHealth), you cannot use a Medigap policy at the same time.
Important: You Still Enroll Through Medicare First
Even if you want to use UnitedHealth’s plans, you still have to enroll in Medicare first through the Social Security Administration. Once enrolled, you can then select a plan from UnitedHealth or any other provider.
Apply for Medicare at https://www.ssa.gov/benefits/medicare/
When Can You Sign Up or Make Changes?
- Initial Enrollment Period
Starts 3 months before you turn 65 and ends 3 months after. - Annual Enrollment Period (October 15 – December 7)
You can switch from Original Medicare to Medicare Advantage or change plans. - Medicare Advantage Open Enrollment (January 1 – March 31)
If you’re already on a Medicare Advantage Plan, you can switch or go back to Original Medicare.
Real-Life Example: How Does This Help?
Let’s say you’re 67 and on Medicare. You pick a UnitedHealth Medicare Advantage plan that includes vision, dental, and drug coverage. You only pay a small premium. You also have a dedicated care coordinator, and your plan helps pay for hearing aids and gym memberships.
This is a major benefit for people on fixed retirement income, as it gives more value than just Medicare alone.
What Experts Say?
According to KFF (Kaiser Family Foundation), over 30 million Americans are now enrolled in Medicare Advantage plans, and many choose UnitedHealth for its reputation and broad coverage.
However, they warn consumers to read the fine print, especially for network restrictions or extra fees.
Final Thoughts
Using both Medicare and UnitedHealth together can be a smart move if you understand how the plans work. It offers more coverage, more benefits, and sometimes lower costs—but only if you pick the right plan for your needs.
Take time to compare plans carefully, check if your doctors are in-network, and understand what benefits matter most to you.