Medicare's Coverage of Starlix

Medicare Part D covers Starlix (nateglinide), a medication that helps control blood sugar in type 2 diabetes. Whether you pay a copay, coinsurance, or the full price depends on which Part D plan you have chosen and which tier Starlix sits on within that plan's formulary — the list of covered drugs.

Starlix is not covered by Medicare Part A or Part B. You need Part D prescription drug coverage, or you need to be enrolled in a Medicare Advantage plan (Part C) that includes drug coverage. If you have neither, you pay the full retail price out of pocket.

The amount you pay also depends on which stage of the Part D benefit year you are in. Early in the year, you pay your plan's copay or coinsurance. Once you and your plan together have spent a certain amount on drugs, you enter the coverage gap — a stage where you pay a higher share of the cost. Later, catastrophic coverage kicks in and your costs drop again.

Key Takeaways

  • Starlix is covered by Medicare Part D plans, but the copay or coinsurance amount varies by plan and by which tier the drug is placed on.
  • You must have Part D coverage or a Medicare Advantage plan with drug benefits; Part A and Part B do not cover prescription drugs.
  • Your out-of-pocket cost changes as you move through the benefit year — copay early on, higher cost-sharing in the coverage gap, then catastrophic coverage later.
  • Your doctor may need to request prior authorization from your plan before Starlix is covered, depending on your plan's rules.
  • Checking your plan's formulary before filling the prescription tells you the exact copay and whether prior authorization is required.

How to Find Out What Your Plan Charges for Starlix

The fastest way is to log into your plan's website or call the customer service number on your insurance card. Have your plan name and member ID ready. Tell them you want to know the copay or coinsurance for Starlix, and ask whether your doctor needs to request prior authorization before the pharmacy can fill it.

If you do not yet have Part D coverage, you can compare plans during the annual enrollment period (October 15 to December 7 each year) or during a special enrollment period if you have had a may have access to life event. Use the Medicare Plan Finder tool at Medicare.gov to see which plans in your area cover Starlix and what the copay would be.

Some plans place Starlix on a higher tier, which means a higher copay. Other plans place it on a lower tier. The difference can be $10 to $50 per month depending on your plan. If your current plan charges a high copay for Starlix, you may be able to switch to a different plan during open enrollment that charges less.

Prior Authorization and Step Therapy Requirements

Some Medicare Part D plans require your doctor to request prior authorization before they will cover Starlix. This means your doctor's office sends a form to your insurance plan explaining why Starlix is medically necessary for you. The plan then approves or denies the request, usually within a few business days.

Other plans use step therapy, which means you may have to try a different, usually cheaper diabetes medication first. Only if that medication does not work or causes side effects will the plan cover Starlix. Ask your plan whether step therapy applies to Starlix before your doctor prescribes it.

If your plan denies coverage or requires step therapy and you believe Starlix is the right medication for you, your doctor can appeal the decision. The appeal process takes longer — typically two to three weeks — so plan ahead if you need the medication soon.

Generic and Brand-Name Versions

Starlix is available as a generic drug (nateglinide). Most Medicare Part D plans cover the generic version at a lower copay than the brand name. If your doctor writes "Dispense as Written" on the prescription, the pharmacy will fill the brand-name Starlix, and you will likely pay more.

Ask your doctor whether the generic version works as well for you. In most cases it does, and the lower copay makes it the practical choice. If you have tried the generic and it did not work, your doctor can request that your plan cover the brand name instead, usually by submitting a prior authorization form.

What to Do If Starlix Is Not Covered or the Copay Is Too High

If your plan does not cover Starlix or the copay is unaffordable, you have several options. First, ask your doctor whether a different diabetes medication on your plan's formulary might work for you. Many plans cover other medications in the same class at a lower cost.

Second, check whether the drug manufacturer offers a patient information program. Novo Nordisk, which makes Starlix, runs programs that may reduce or cover the cost if you meet income requirements. Your doctor's office or the manufacturer's website can tell you how the process works.

Third, if you are enrolled in Original Medicare (Part A and B) without Part D, you may be able to join a Part D plan during the annual enrollment period or a special enrollment period. Switching to a plan that covers Starlix at an affordable copay may cost less overall than paying the full retail price.

Medicare Advantage Plans and Starlix Coverage

Medicare Advantage plans (Part C) must cover at least as many drugs as Original Medicare Part D plans do. Most Medicare Advantage plans do cover Starlix, but the copay and prior authorization rules vary by plan, just as they do with standalone Part D plans.

If you are in a Medicare Advantage plan and Starlix is not covered or the copay is high, you have the same options as Part D members: ask about step therapy, request prior authorization, look into patient information programs, or switch to a different plan during open enrollment.

Frequently Asked Questions

Will Medicare cover Starlix if my doctor prescribes it for prediabetes?

Starlix is approved by the FDA for type 2 diabetes only, not prediabetes. Medicare Part D plans typically cover it only when prescribed for type 2 diabetes. If your doctor prescribes it for prediabetes, your plan may deny the claim. Check with your plan before filling the prescription.

Can I use a GoodRx coupon instead of my Medicare Part D coverage?

You can, but it is usually not allowed to use both at the same time. If the GoodRx price is lower than your Part D copay, you may choose to pay cash with the coupon instead. However, this does not count toward your Part D deductible or out-of-pocket maximum, so it may cost you more overall in the long run.

What happens to my Starlix coverage if I switch Medicare plans?

Your new plan may cover Starlix at a different copay or may require prior authorization. Always check your new plan's formulary before your current coverage ends. If there is a gap, ask your doctor or pharmacist whether you can get a short-term supply to bridge the transition.

Does my Part D plan cover Starlix if I am also on Medicaid?

If you are enrolled in both Medicare and Medicaid (dual may be able to access), Medicaid is usually the primary payer for drugs. Medicare Part D becomes secondary. Contact your state Medicaid office to find out whether Starlix is covered under your state's Medicaid program and what your copay would be.

Can I ask my doctor to prescribe a three-month supply instead of one month to save on copays?

Some Medicare Part D plans allow 90-day supplies at a lower total copay. Others charge the same copay per fill regardless of quantity. Ask your plan whether a 90-day supply is an option and whether it would save you money. Your pharmacy can also tell you what the copay would be for different quantities.