Key Takeaways

• Medicare Supplement Plan G can fill cost gaps Medicare leaves, but works differently with PSHB than before.
• Misconceptions about Medigap and PSHB are common—use trusted OPM and Medicare resources to make informed decisions.

Did you know that many Medicare-eligible postal retirees have questions or concerns about how supplement plans like Plan G interact with their new PSHB coverage? Here’s what every retiree needs to know—plain and simple.

What Is Medicare Supplement Plan G?

Medicare Supplement Plan G, often called Medigap Plan G, is a private insurance policy designed to help cover certain out-of-pocket expenses that traditional Medicare (Parts A and B) doesn’t pay. For many postal retirees, understanding Plan G’s place in their overall benefit picture is key as they transition from FEHB to PSHB.

How Plan G Works with Medicare

With Medicare Part A and Part B as your foundation, Plan G steps in as secondary coverage. Medicare pays its share of approved healthcare costs first. Then, Plan G helps cover many of the remaining expenses—like copayments, coinsurance, and some deductibles—except for the Medicare Part B deductible, which you’ll still need to pay yourself. This setup means you can predict your healthcare expenses more accurately, as Plan G fills most gaps in Original Medicare.

Eligibility for Postal Retirees

To enroll in a Medicare Supplement Plan G policy, you must be enrolled in both Medicare Part A and Part B. Postal retirees typically become eligible when they reach age 65 or qualify by disability. Since the PSHB program started in January 2025, postal retirees now face new requirements—enrolling in Medicare Part B is usually necessary to keep their PSHB coverage in retirement. Plan G remains an optional, supplemental choice if you want to add coverage beyond what PSHB and Original Medicare offer.

How Does Plan G Fit with PSHB?

Understanding the relationship between PSHB (Postal Service Health Benefits program) and various forms of Medicare coverage, including Plan G, is essential to avoid coverage gaps or unnecessary overlap.

Overview of PSHB and Medicare

The PSHB program, which officially launched in 2025, is the new health insurance program for postal retirees. Most Medicare-eligible postal retirees must enroll in Medicare Part B and—if desired—Medicare Supplement insurance like Plan G. While PSHB plans generally work alongside Medicare Parts A and B, Plan G works only with Original Medicare—not with private insurance plans (including all PSHB offerings). This means Plan G cannot coordinate benefits with a PSHB plan—you typically may have only one as your main non-Medicare plan.

Plan G Enrollment Timeline for Retirees

You’re usually eligible to enroll in Plan G during the six-month Medigap Open Enrollment Period, which starts when you’re both 65 or older and enrolled in Medicare Part B. For postal retirees, this may coincide with the PSHB transition in 2025 or at your Medicare eligibility date if later. After this open window, enrolling in Plan G might involve answering health questions or facing higher premiums, depending on your state’s rules. Remember, if you keep PSHB coverage, adding Plan G can create expensive and unnecessary overlap—so coordinate carefully.

What Are Common Plan G Myths?

Postal retirees face an ever-evolving benefits landscape. This has led to a handful of persistent myths, especially now that PSHB has replaced FEHB for USPS retirees.

Misconceptions About Plan G Coverage

One common myth is that Plan G “covers everything Medicare doesn’t.” While Plan G covers many out-of-pocket expenses, it doesn’t cover the Medicare Part B deductible, prescription drugs (Part D), routine dental, vision, or hearing care. Another myth is that you can use Plan G with any health plan you like—this isn’t the case. Plan G only works with Original Medicare, not with PSHB or other group health plans.

Myths Around FEHB, PSHB, and Medigap

Some believe you can stack FEHB (now PSHB), Medicare, and a Medigap plan like Plan G. In reality, holding both PSHB and a Medigap plan often creates duplicative coverage, unnecessary premiums, or outright conflicts—these policies aren’t designed to work together. Another misunderstanding: PSHB enrollees are “required” to buy Medigap. In truth, PSHB plans are structured to complement Medicare for most retirees, so Medigap is always optional and may not provide meaningful extra value if you already have comprehensive PSHB coverage.

Can You Use Plan G With PSHB?

When transitioning to postal retirement, consider how your health coverage choices interact to avoid confusion and extra costs.

Coordination of Benefits

Medicare Supplement (Medigap) policies like Plan G are specifically meant to coordinate with Original Medicare. They do not coordinate with group health plans, such as the plans offered under PSHB. Typically, you cannot use both PSHB and Plan G together. If you keep your PSHB coverage as your non-Medicare plan, you generally won’t need—and may not be able to use—a Medigap policy at the same time. Combining them usually creates overlapping premiums and doesn’t add coverage benefits.

Important Rules to Know

You must stay compliant with OPM and Medicare rules. Should you decide to use a Medigap policy, you will often need to drop your PSHB plan (after carefully reviewing your particular situation and relevant deadlines). Medicare leads claims processing; Medigap fills certain cost gaps; but PSHB is not designed to be used with Medigap. If you have questions, always review your choices with a qualified benefits counselor.

Pros and Cons for Postal Retirees

Evaluating whether Medicare Supplement Plan G makes sense for you as a postal retiree depends on your specific health needs and financial situation.

Potential Advantages

• Predictable costs: Plan G covers most Medicare out-of-pocket costs (except the Part B deductible), making medical expenses easier to budget.
• Nationwide access: With Plan G working alongside Original Medicare, you can see any provider who accepts Medicare—an appealing feature for those who travel or split time between locations.

Considerations and Limitations

• Not compatible with PSHB: You can’t pair Plan G with a PSHB plan, so you may have to choose one or the other.
• Premiums and underwriting: Outside your open enrollment window, you may be subject to health underwriting or higher premiums for Plan G.
• Limited extra benefits: Dental, vision, and prescription drug coverage are not included—these require standalone plans or PSHB coverage.

FAQ: Plan G and Postal Retiree Benefits

Typical Enrollment Questions

Many postal retirees ask, “Can I keep PSHB and add Plan G?” Usually, you choose one path. PSHB plans are developed to work seamlessly with Medicare Parts A and B for most needs. If you want the freedom of Medigap, you typically need to leave PSHB. Enrollment windows depend on your Medicare Part B effective date or the PSHB transition period (starting in 2025, if you become newly eligible).

PSHB and Medicare Deadlines

The official PSHB transition occurred on January 1, 2025. If you turned 65 before or after this date, your Medigap open enrollment window starts the first month you have Part B and are 65 or older. Missing this window may restrict Medigap access or raise costs. PSHB has its own Open Season for eligible retirees and spouses—stay mindful of those dates each fall.

Where to Find More Reliable Guidance?

Navigating the rules around Medicare, Medigap, and PSHB can feel complex, but trustworthy, non-commercial sources can help.

OPM and Medicare Resources

The U.S. Office of Personnel Management (OPM) provides updates, fact sheets, and official guides about postal retiree benefits. Medicare.gov hosts accurate, up-to-date explanations of benefits, timelines, and plan choices. These resources break down the eligibility, enrollment, and coordination rules without the confusion of sales pitches.

Trusted Educational Sources

Besides OPM and Medicare.gov, local State Health Insurance Assistance Programs (SHIP) offer free, unbiased counseling to Medicare-eligible individuals. Reputable retiree associations and federal employee unions can also provide updates on PSHB, enrollment deadlines, and best practices for coordinating benefits. Relying on official and educational resources ensures you’ll get compliance-accurate, neutral guidance—exactly what you need during a benefits transition.