GLP-1 coverage in FEHB

1. Where the rules stand

OPM sets a floor, and carriers decide everything above it. The floor is that every FEHB and PSHB plan must carry, on its formulary, at least one anti-obesity medication from the GLP-1 class plus at least two additional oral anti-obesity medications.

Read that carefully, because the gap between the floor and what you need is where people get caught. "At least one GLP-1" does not mean your GLP-1. A plan satisfies the requirement by covering a single qualifying drug; if the one you were prescribed is not that drug, your plan is fully compliant and you still have no coverage for it.

OPM also frames anti-obesity medication as one component of a broader obesity management benefit, alongside nutrition and physical activity support, behavioral counseling, and criteria for metabolic surgery.

2. What changes in 2027

The operative change in OPM's 2027 call letter is procedural rather than a coverage cut: intensive behavioral therapy becomes a condition of coverage, both before starting an anti-obesity medication and while continuing on it.

In OPM's framing, prior authorization must confirm that the member has demonstrated and will continue participation in lifestyle interventions meeting the rigor of IBT. Plans that previously accepted an attestation — a form saying you intend to make lifestyle changes — are directed to require documented participation instead.

The practical consequence is lead time. If your coverage depends on approval in January, the documentation has to be in motion well before then, and a program that satisfies one carrier may not satisfy another. Ask your plan what specifically counts, in writing, before Open Season closes.

3. Diabetes coverage is a separate question

This distinction causes more confusion than anything else in the topic, and it is worth being precise about.

Several of these medications are approved for more than one condition. A GLP-1 prescribed for type 2 diabetes is generally handled under standard diabetes formulary rules, and the anti-obesity medication requirements — including the behavioral therapy condition — are aimed at the weight-loss indication.

So two people can take chemically similar drugs and face entirely different coverage rules, depending on the diagnosis on the prescription. If you are being treated for diabetes, your situation is not the one this article's 2027 changes describe. If you are unsure which applies to you, that is a question for your prescriber and your carrier, not for a benefits article.

4. Why this shows up in your premium

FEHB premiums are set from how enrollees actually used their plans in the prior year. High-cost specialty drugs therefore feed directly into the next year's rates, and OPM has named anti-obesity medications among the drivers of recent increases, alongside an aging workforce and rising chronic-condition costs.

Two back-to-back double-digit years is the first such run in at least a decade, and it lands hardest on annuitants, who pay premiums from a fixed annuity after tax rather than pre-tax from a paycheck. The 2027 figures are tracked as they post in FEHB 2027: what changes.

5. Comparing plans properly

Here is the part that saves real money, and almost nobody does it.

Most people compare FEHB plans on the premium line. If you take a high-cost specialty drug, that is the wrong comparison — the premium difference between two plans is frequently a few hundred dollars a year, while the difference in what those two plans charge you for the same medication can run into the thousands.

• Get the exact drug name, dose and quantity from your prescription. Formulary tiers are drug-specific and dose-specific.
• Use each carrier's own drug pricing tool, not a general comparison site. Enter the same drug, dose and quantity at each one so the comparison is like for like.
• Add twelve months of drug cost to twelve months of premium. That total is the number to compare. A plan with a higher premium often wins outright once the drug is included.
• Check the prior-authorization requirements for 2027 specifically, since they are changing. Ask what documentation the carrier accepts.
• Confirm the tier for next year, not this year. Specialty formularies are the most volatile part of a plan brochure year to year.

6. Retirees and Medicare

Traditional Medicare generally does not cover medications prescribed for weight loss, which makes the prescription drug side of your FEHB plan more consequential in retirement than it was while you were working.

One time-limited exception is worth knowing. A CMS demonstration that began July 1, 2026 allows eligible Part D enrollees — including federal retirees whose FEHB plans provide prescription coverage through an EGWP arrangement — to obtain certain anti-obesity medications at a flat monthly copay. It carries a body mass index requirement, prior authorization, and an end date of December 31, 2027. The copay does not count toward the Part D out-of-pocket cap.

Whether it applies to you depends on your specific plan's prescription arrangement, so confirm with the carrier rather than assuming. The broader Part D structure for federal retirees is covered in Part D prescription drug coverage, and the Open Season mechanics in Medicare Open Season decisions.

7. What to do before Open Season

• Now: ask your carrier in writing what documentation will satisfy the 2027 behavioral therapy requirement, and how long approval takes.
• Early October: when OPM posts the 2027 rates and brochures, check your drug's tier in Section 5 of the brochure for each plan you are considering.
• November 9–14: make the election in the first week rather than the last. If you are adding a family member, the verification rule requires documents up front.
• Before December 14: confirm the election was accepted, not merely submitted.
• If you are within five years of retiring: nothing here changes the five-year rule. Switching plans is fine; a gap in enrollment is not.

And if a claim is denied, plans have a formal reconsideration process, with OPM review available after the carrier's final decision. A denial on documentation grounds is frequently fixable by supplying what the carrier actually asked for rather than by changing plans.

8. Frequently asked questions

This page explains health insurance coverage rules and costs. It is not medical advice, and nothing here is a recommendation for or against any medication. Decisions about treatment belong with you and your physician; confirm coverage specifics with your carrier.