Best Medicare Supplement Plans in Washington State

Written by: 
Matt Kiggins
Last updated: 
Apr 8, 2024

Medicare Supplement insurance plans allow beneficiaries to keep the basic benefits offered by Original Medicare while extending their Medicare coverage to fill some of the gaps left by the federal Medicare program. There are ten Medicare Supplement plans to choose from.

  • Of the ten plans offered in 2024, Cigna's Medicare Supplement Plan G is the best choice for Washington State residents as it offers comprehensive benefits at a very reasonable monthly premium of $195.
  • Mutual of Omaha's Medicare Supplement Plan N is a great option for those that want the best monthly value without compromising coverage, for a $140 monthly rate.
  • For those wanting the lowest possible monthly premium, Mutual of Omaha's High Deductible Plan G is an excellent choice. The plan provides access to the same benefits as Plan G once you meet the annual deductible of $2,700, and costs only $56 per month.

Below are some key benefits for these plans and a list of companies with the most competitive rates.

Best Plan G:

Cigna Medicare Supplement Plan G

  • Plan G is one of the most comprehensive plans available to beneficiaries.
  • It covers many out-of-pocket costs except the deductible for Medicare Part B.

There are some clear benefits to selecting Plan G:

  • Comprehensive benefits include coverage for Part B excess charges, Medicare Part A deductible, and Part B coinsurance.
  • No referrals are required.
  • Freedom to see any medical provider willing to accept Original Medicare.

Monthly Plan Cost: $195

*Quotes for a 65 Year Old non smoking female, zip code 98001.

Best Plan N:

Mutual of Omaha Medicare Supplement Plan N

Medicare Plan N offers lower premiums than Medicare Plan F and Medicare Plan G.

Plan N benefits include, but are not limited to:

  • Skilled nursing facilities
  • $0 Part A deductible
  • Foreign travel emergency healthcare
  • Maximum $20 copay for office visits
  • Maximum $50 copay for an ER visit (waived if admitted)
  • Restrictions:
  • Must pay Part B deductible
  • Must pay Part B excess charges
  • Must pay copays for office visits and ER visits

Monthly Plan Cost: $140

*Quotes for a 65 Year Old non smoking female, in zip code 98001.

Best High Deductible Plan G:

Mutual Of Omaha High-Deductible Plan G

  • Same coverage as standard Plan G once the high deductible of $2,700 is met.
  • Significantly cheaper than traditional Medicare Supplement Plan G.

Monthly Plan Cost: $56

*Quotes for a 65 Year Old non smoking female, in zip code 98001.

Best Full Coverage

Cigna Medicare Supplement Plan F

  • Medicare Plan F offers the most comprehensive coverage, including the Part A deductible, Medicare Part B deductible, and all coinsurances.
  • Beneficiaries must have enrolled in Original Medicare before January 1, 2020, to be eligible.

Monthly Plan Cost: $240

*Quotes for a 65 Year Old non smoking female, in zip code 98001.

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What's the Best Medicare Supplement Company in Washington State?

Based on our review of several key factors, Cigna is the best Medicare Supplement company in Washington State.

While Cigna Medigap plans tend to be more affordable in Washington State, it's not the only factor when selecting the best Medicare Supplement company. For example, depending on your plan letter of choice, one provider might offer Plan N at a lower cost but may be pricier for Plan G; every insurer has its own set of advantages and drawbacks depending on their levels of coverage.

For this reason, Cigna remains our top selection during the review process due to its affordability, expansive range of plan choices, household premium discounts, and high customer satisfaction rates.

This chart compares different Medicare Supplement companies to Cigna that are also available in Washington State, including sample premiums, ratings, and market share:


Market share: 5.83%

Plan G cost: $195

Plan N cost: $143

Financial strength: A

Mutual of Omaha

Market share: 8.94%

Plan G cost: $198

Plan N cost: $140

Financial strength: A+

United Healthcare

Market share: 35.11%

Plan G cost: $218

Plan N cost: $178

Financial strength: A

How Much Does a Medigap Plan Cost in Washington State?

The best price for Medicare Supplement Plan G in Washington State is $195 per month with Cigna.

Your age and plan choice will have the most significant impact on your premium.

Here you can see how the prices compare for several different plans:

Medigap Plan

Plan F

Plan G

Plan N

High Deductible G

Plan A

Plan K

Monthly Cost







Plan Popularity in Washington State







Quotes are for sample purposes only. Prices are the average monthly rate in Washington State for a 65-year-old female nonsmoker. Part B start date and or medical underwriting may affect your rate.

When Can I Apply for a Medicare Supplement Plan?

You have the following options when enrolling in a Medigap plan in Washington State:

1. Medigap Open Enrollment Period

When your eligibility for Original Medicare opens, you're also eligible for Medigap insurance. Once you are 65 years old and enrolled in Medicare Part B, your six-month Medigap Open Enrollment Period begins.

You have guaranteed issue rights during this period. These rights ensure the Medicare insurance company cannot deny you coverage under the Medicare Supplement plan of your choice. They must also give you the same rates as people with no health conditions, even if you have pre-existing conditions.

Private insurance companies will offer the lowest rates during your Open Enrollment Period. The effective date for new policies is typically 30 days after enrollment.

2. Special Enrollment Periods

If you qualify for a particular enrollment period, you may receive the same guaranteed issue rates after your Open Enrollment Period closes. For example, you may receive special enrollment privileges if you had medical insurance through your employer when you first enrolled in Part B but later lost that coverage.

3. Outside of Enrollment Periods

You can apply for Medicare Supplemental benefits anytime, even if your Open Enrollment Period has passed. However, the Medigap insurance company can use medical underwriting to determine a higher rate. They can also deny your Medicare Supplement plan coverage.

If You Are Under 65

You may not be able to purchase a Medicare Supplement insurance policy under age 65. However, several states must sell Medigap to those under 65 with a disability or end-stage renal disease (ESRD).

Can I Use My Medigap Plan in Other States?

The beauty of Medicare Supplement plans is that they can be used anywhere in the country as long as the doctor you see or the healthcare facility you use accepts Medicare. Crossing state lines is not a problem because there are no preferred provider networks or referral requirements you have to meet. One of the primary benefits of a Medigap plan is that it gives you the freedom to seek the best care, whether in Washington State or Maine.

Medicare Supplement plans are the same in 46 other states. This means that the outline of coverage for Medigap Plan F is the same in North Carolina as in Washington State . Because the plans are standardized, you can keep your same project as long as you stay enrolled in Original Medicare. However, remember that your premium amount might change in your new location.

Ready to Learn More?

We help educate Medicare beneficiaries on their Medigap options and help them go through the process of reviewing and comparing plans. We work with some of the nation's top-rated Medigap carriers. So give us a call today, or request a quote online to learn more about Aetna Medicare Supplement plan G and Mutual of Omaha Medicare Supplement plan G in your state.


Cigna and Mutual of Omaha are excellent choices when choosing a Medicare Supplement provider in Washington. Both companies offer a variety of plans with competitive rates, as well as customer service that is second to none.

Most Medicare Supplement plans have a base premium of $56 to $240 per month, depending on your age, where you live, and other factors.

Plan G premiums in Washington usually range from $195 to $218 monthly. The cost of a Medigap plan will vary depending on factors like the insurer, the policyholder's age, location, and plan type.

Unless you qualify for a particular enrollment period with guaranteed issue rights, you might be required to undergo a medical underwriting. Insurers can deny coverage or charge a higher premium based on this information.

You're guaranteed enrollment in the insurance policy of your choice if you're within your open enrollment period or a particular enrollment period. Outside those periods, the insurer can deny coverage to Medicare beneficiaries due to a current or pre-existing health condition.

Matt Kiggins
Matt Kiggins
Senior Editor

For over 15 years, Matt Kiggins has been the senior editor at Simple Advisor, giving detailed advice on Medicare, life insurance, and dental coverage to thousands of clients in more than forty states. His demonstrated expertise in assisting people with their health plan selection is remarkable — it’s evident that he stands out among competitors as the go-to source for knowledge and support.

Matt holds a resident 2–15 Florida Health & Life (Including Annuities & Variable Contracts) Agent License in Florida, his state license number is P116762 (Issued 10/1/2007).

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Matt Kiggins
Matt Kiggins
Senior Editor
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Please note that the average quotes provided are for demonstration purposes only. Your actual premiums will be determined based on several factors such as your health conditions, age, location, tobacco status, gender, and insurance provider.

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