Your prior authorization does not travel with you. A new plan means a new authorization under new criteria, and the gap between the two is where people lose weeks of supply mid-titration. The work that prevents it happens before the switch, not after the first rejected claim.
This is one part of getting a GLP-1 covered. For the full picture, see GLP-1 Insurance Coverage: The Complete Guide.
What does not carry over
Almost none of it. A new plan brings its own formulary, its own criteria, its own prior authorization requirement and its own deductible.
The drug you are stable on may sit on a different tier, require step therapy it did not before, or fall outside the new formulary entirely. Approval under your old plan carries no weight with the new one.
Before the switch
If you know the change is coming, this is where the leverage is.
- Get the new plan’s formulary and check your exact drug and strength. Note whether PA, ST or QL appears against it.
- Request the new plan’s clinical policy for the drug so you know what the criteria will be.
- Ask your prescriber to file the new prior authorization as early as the new plan will accept one. Many will not accept a request before the coverage effective date, so ask about timing specifically.
- Collect your own records: measured weights with dates, coded comorbidities, documentation of prior attempts. You will likely need to prove eligibility from scratch.
- Refill as late as your old plan permits, so you carry the maximum supply across the boundary.
Ask about continuity of care
Many plans have transition or continuity of care provisions for people already established on a medication, particularly in the first weeks of new coverage. These are frequently not applied automatically. Ask explicitly whether a transition fill or continuity provision applies to you, and get the answer with a reference number.
This is among the most useful questions you can ask a new plan, and among the least likely to be volunteered.
The baseline problem
New criteria usually assess your starting BMI. If treatment has already brought your BMI below the threshold, you can find yourself refused on the grounds that you no longer qualify for a drug that is working.
The counter is documentation of your pre-treatment weight. Make sure your highest recorded weight, with its date, is available to the new prescriber and the new plan. If it sits in records from a previous practice, request a copy yourself before the switch rather than trying to chase it during a gap.
If a gap opens anyway
Contact your prescriber the same day. Ask whether an expedited review is possible and whether the new plan offers a transition supply.
Ask the pharmacy whether an emergency supply is available. It depends on the drug, the plan and state rules, and it is discretionary, but it is worth asking.
Do not stretch your remaining supply by changing your dose. Whether and how to adjust after an interruption is a prescribing decision, and it interacts with tolerance and your titration schedule in ways worth discussing rather than improvising.
Deductibles reset too
A mid-year switch usually means starting a new deductible, even if you had already met the old one. For a high-cost monthly medication this can be a substantial and unwelcome surprise in the first months of new coverage.
Worth checking before the switch if you have any choice about timing.
Your new plan assesses you against its own criteria, so the BMI thresholds and the documentation both need to travel with you. Ask specifically about continuity provisions, which are rarely applied unless requested.
Frequently asked questions
Can I ask the new plan to honour my old authorization?
You can ask, and the answer is usually no, though it can prompt them to explain their transition provisions.
How early can the new prior authorization be filed?
Many plans will not accept one before coverage begins. Ask the new plan directly, since the answer determines your timeline.
What if the new plan excludes the drug class?
Then the route is your employer rather than an appeal, since there is no clinical decision to overturn.
Does COBRA keep my authorization?
COBRA continues the same plan, so an active authorization generally continues with it. Confirm rather than assume.
Do I have to re-titrate after a gap?
It depends on the length of the gap and is a decision for your prescriber. Ask before the gap opens if you can.
Will the new plan want new documentation of prior attempts?
Usually yes. Bring the same evidence you assembled the first time.