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Top 10 Medicare Supplement Insurance Companies in 2021


When shopping around for the best Medigap policy available to you, it’s helpful to be familiar with the top 10 Medicare Supplement insurance companies in 2021. Whether you’re new to Medicare or are now considering supplemental coverage a few years after enrolling, we’re here with the information you need to make the best decision!

For a company offering Medigap to be one of the best, we must consider several elements. These measures include consumer reports, AM Best rating, Standard and Poor (S&P) rating, and the company’s number of years in the market. Knowing about these carriers’ reputations will help when you compare Medigap rates to find the best plan for your budget.

Top 10 Supplemental Medicare Insurance Companies in 2021

  1. Mutual of Omaha – Best Overall
  2. Aetna – High-Quality Nationwide Options
  3. Cigna – Superior Customer Care
  4. United American – Best Enrollment Experience
  5. GPM – Superior Coverage Options
  6. UnitedHealthcare – Wide Variety of Plan Options
  7. Manhattan Life – Best Website Experience
  8. Bankers Fidelity – Best Senior Expertise
  9. Blue Cross Blue Shield – Best Mobile App
  10. Medico – Best Value

The above are the top 10 most well-known companies offering Medicare Supplement policies. Every Medigap plan meets government standardization requirements. No matter which company you choose, the benefits are the same when the plan is identical. So, Plan G coverage with Mutual of Omaha is the same as Plan G with Medico.

Plan N coverage is also the same across the board, regardless of whether you go with Cigna, UnitedHealthcare, or any other company that offers the plan. Additionally, all Medicare Supplement plans allow you to go to any doctor accepting Medicare assignment – which is the majority of doctors, coast-to-coast.

Thus, while comparing options, you may wonder why your premium rate quotes vary between carriers for the same letter plan. In the case of Medicare Supplement plans, many factors affect what you’ll pay each month. Demographic information – such as age, location, and tobacco use – affect Medigap premium prices. Indeed, the carrier offering the plan also influences rates across the board.

Each of the top 10 Medicare Supplement carriers on the list above is a private insurance company, which is the only type of entity that offers Medigap policies. These companies have various financial ratings and rate increase histories, both of which have a role in determining what you’ll pay each month. Due to the impact of the company you choose for your Medigap plan, research is crucial.

What Are the Best Rated Medicare Supplement Companies in 2021?

Now that you’re familiar with the top 10 well-known Medicare Supplement companies, we’ll let you know which five are the highest rated. There are several official types of ratings for insurance companies but in this article, we’ll focus on the AM Best and S&P ratings. A high rating with both of these agencies indicates a company’s financial stability and offering of high-quality insurance products.

Mutual Of Omaha: Best Rated Medicare Supplement Company

It’s clear why Mutual of Omaha (MOO) is at the top of our list. This company has an A+ rating with AM Best and an AA- rating with S&P. Established in 1909, Mutual of Omaha has been a household name for over a century. They pay 98% of Medicare claims within 12 hours, saving clients the hassle of worrying about claim status.

Plus, Mutual of Omaha offers more than just Medigap plans. You can also enroll in a Part D prescription drug plan or purchase long-term care insurance through MOO. Household discounts make it beneficial to choose MOO if your spouse already has an active Medigap policy with this company.

Aetna: Highly Rated Company for Medigap Plans

One of the most established insurance companies, Aetna was founded in 1853. Over 39 million customers rely on Aetna for health care, including Medicare. Aetna has excellent ratings all around; an A from AM Best and an A+ from S&P underscore the reasons for this company’s longevity.

Aetna Medigap plans include a 12-month rate lock. Meaning, you have the same rate with no increases during the first 12 months. They also offer a household discount in some states.

Cigna: A Top-Rated Carrier for Medicare Supplement Plans

The Insurance Company of North America (INA) began in 1792 as the first Marine insurer of the United States. INA would eventually become the company we know today as Cigna, one of the most renowned health insurance carriers offering Medicare Supplement policies. Both AM Best and S&P rate Cigna at an A. This company also offers a 7% household discount in select states.

United American: A Medigap Carrier with High Ratings

United American Insurance Company was founded in 1947. The company maintains an A+ rating from AM Best and has done so for over 40 years. S&P’s rating for United American is AA-. The company is most well-known for its High Deductible Plan F. United American is a subsidiary of Globe Life.

Government Personnel Mutual Life Insurance: A Best-Rated Medicare Supplement Carrier

Government Personnel Mutual Life Insurance is commonly called GPM. AM Best rates GPM with an A-. GPM offers five plans; Plan A, C, F, G, and N. Household discounts are available through this carrier as well – talk to your agent about the amount in your state.

Choosing the Best Medicare Supplement Company for You

The policy with the lowest premium rate right now isn’t necessarily the best policy for you in the long run. For example, even though a Plan G policy with Company A costs less each month than the same through Company B, there’s still more to consider.

Perhaps Company A has a history of steep rate increases while Company B’s rate increases are lower than average. If so, in a few years’ time, you could pay less with the originally pricier Company B policy than you would be paying at the same time after choosing Company A.

In addition, it’s crucial to think about your future experience with the company. We’re always thinking about ways to save money, but what about time? Choosing a company with a reputation for excellent customer service will provide value throughout the enrollment process and the entire life of your policy.

Lastly, you’ll benefit from selecting a policy from an established company. The insurance companies that started long ago and stand the test of time tend to be those offering products with which clients are satisfied.

How to Choose the Top Medicare Supplement Company in Your Area

While every top carrier is competitive, it makes sense to pay more for superior customer service and financial stability. There are many top-rated medicare supplement companies to choose from in 2021, and when you use our agents, you get your cake and eat it too!

When you enroll in a policy through us, you get the benefits of a low-cost plan with elite customer service.

Our agents can access the most popular Medigap plans for you! So, instead of calling each company for a quote, you dial one agent, and they quote you on all the top carriers. Getting all your quotes in one phone call is going to save you time and money.

Are you considering buying a Medicare Supplement plan? Call our agents at the number above to get the best coverage in your area.

Don't have time to call today? Fill out an online rate comparison form, and an agent will call you to discuss the top Medicare Supplement companies in your area.

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Jagger Esch

Lindsay Malzone is the Medicare expert for MedicareFAQ. She has been working in the Medicare industry since 2017. She is featured in many publications as well as writes regularly for other expert columns regarding Medicare. You can also find her over on our Medicare Channel on YouTube as well as contributing to our Medicare Community on Facebook.

19 thoughts on “Top 10 Medicare Supplement Insurance Companies in 2021

  1. No mention of premiums. Mutual of Omaha raises their rates annually and they are crooks. Mine stared at $97/mo at 65 increases amount to at $174/mo at 69. Large increases last two years 2020 increased by $34/mo now for 2021 increased by $28/mo these increases are alot. From the $97/mo to the $174/mo in four years. Take a look at those rates when you rate these insurance companies.

    1. Hi Charlotte! Thank you so much for sharing this information. This is very useful for others who are researching carriers. It’s important to keep in mind that rate increases are based on many different factors. It’s possible that you saw a rate increase this high, but others in a different state did not.

  2. I’m turning 65 in March and am domiciled in TX, but spend a lot of time in AZ. We get all our medical care in AZ. I signed up for Medicare part A and B. Both will be effective March 2021. I have 2 questions:
    1. Do I have to get a Medigap plan G in TX or can I choose to get one in AZ (especially considering issue-age pricing in AZ gives me better pricing especially long-term)?
    2. If I do have to sign up in TX, and I go with a company that offers plan G in both states (TX & AZ) can I at some point in the future if we change our domicile switch from the TX plan G to the AZ plan G without underwriting if is with the same company, i.e. just get new pricing?

    1. Hello Pa Le! Thank you for your question. 1) You’ll want to sign up in the state you do your taxes. 2) Most carriers will take the plan with you across state lines and the price will adjust over time accordingly. It’s important to go with a larger carrier, such as Mutual of Omaha, Aetna, or Cigna, to get this option. We have another FAQ article that goes over dual-residency for Medicare beneficiaries that provides additional information. I hope this helps!

      1. Thank you! One follow-up question: If I move from one state (TX) where I have a plan G to another state (AZ), can a get a new Plan G in AZ WITHOUT Medical underwriting? I.e. Does an out-of-state move give me Guaranteed Issue rights for a plan G?

      2. You’re welcome! Since Medigap plans travel with you, you would not need to change plans because you moved. Your plan will travel with you from Texas to Arizona. However, you may be able to find a lower rate for the same plan with a different carrier. You can compare rates when you move, but you would have to go through medical underwriting. If you’re overall healthy, you shouldn’t have an issue with switching carriers.

  3. Two questions: (1) Can companies that offer supplement plans deny enrollment on the basis of pre-existing conditions? (2) I am thinking of switching from my Plan J (no longer offered) to a different plan. Is it still true that i can get a plan with the same or fewer benefits, but not one with more benefits? I have had original medicare since 2005. Thanks.

    1. Hi Mary! Thank you for your questions! 1) Yes, supplement companies can deny you coverage due to pre-existing conditions when enrolling outside of your Medigap Open Enrollment Period. 2) Plan J was discontinued because it essentially was the same plan as Plan F, which is the plan that offers the most benefits. You’re eligible to switch to Plan F or any other plan of your choice. However, unless you have state-specific rules that apply to Plan J, you will still have to answer health questions to switch to a different Medigap plan. You could be denied coverage due to a pre-existing condition. Keep in mind, not all carriers will deny you for the same reasons. Just because one carrier denied your coverage doesn’t mean all of them will. I would recommend giving us a call. We can pull all the plans in your area and determine if any pre-existing conditions you have will impact your approval odds. You may find that Plan F has a lower premium than your current Plan J.

  4. I am thinking of having knee replacement surgery. Right now I’m just getting shots every 3 months. They don’t last that long but they do help. My insurance is Humana Choice (PPO). Do you or can you tell me what my out of pocket cost will be if I have the surgery. Or a ball park number. I live in Waco, Tx. I just left my DR.s office. We talked about it and he told me to think about it. If I opt not to have the surgery I can continue with the shots. I would like to have some idea what it would cost me.

    1. Hi Diana! Humana Choice is an Advantage plan. The carrier is who determines how much you will pay out of pocket, it’s not standardized by the federal government like Medicare Supplement plans are. You will need to contact Humana directly to find out how much your out of pocket costs will be for knee replacement surgery. Unfortunately, there is no way for us to look it up for you.

  5. I know that many people still question is United Medicare Advisors a reputable company. Such rating may help better understand the market.

  6. My husband and I currently have Mutual of Omaha Plan G. Rates are going up 16%. Tried switching to Aetna. Was declined due to either my one med, flecainide or my ablation a year ago. Is there an insurance that we could get? Same plan but certainly lower premiums.

    1. Hi Judy! Some carriers will deny you for a reason that another carrier would not. Your best option is to give us a call so we can pull up all the carriers that offer Plan G in your area. Each carrier offers different plans in each state. Our agents will know which carriers will deny your policy for taking those medications & which carriers would approve your policy.

  7. Do these supplemental plans cover Milrinone since our Medicare plan has a $16.58 per day co-pay which we cannot afford

    1. Hi Cynthia! Is Milrinone administered at the doctors’ office? If so, that would probably be covered under Part B. I’m thinking the $16.58 is the 20% copay you’re left responsible for. If this is the case, then yes, a Medigap plan would cover that 20% copay. Any medication taken at home would be covered under Part D.

  8. My wife is 65 and will be as of 12/25/2018. we live in Idaho 6 months and Mississippi 6 months. Humana choice is what we currently have. half the time we are out of network with our insurance. looking for a F plan with 0 copay and deductible, could you please adise.

    1. Hi Jerry! This is a common issue with Medicare Advantage Plans. Regardless of the carrier you go with, all standard Plan F benefits will remain the same and have a $0 copay and deductible. The only difference will be the premium your carrier charges for the plan. You’ll have nationwide coverage, so you can use the plan in Idaho as well as Mississippi.

  9. My husband is retired military with Tricare for Life on both of us as secondary to our required by social security Medicare parts A&B. Who has the best supplement for us to cover dental, vision, hearing.

    1. Hi Joyce! That depends on many factors, like your location. If you give us a call, we’ll be able to collect the information needed to provide you with the carriers that offer dental, vision, and hearing in your area.

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