Will Medicare Part D Plans Cover the Cost of Synthroid?

Last Updated : 09/15/20183 min read

Synthroid (its generic name is Levothyroxine), is usually prescribed for patients who have an underactive thyroid, according to the Food and Drug Administration (FDA). The synthetic T4 in Synthroid is identical to that produced by the human thyroid gland, according to the FDA.

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If you are prescribed Synthroid or levothyroxine, you will typically need to take it daily.

Why take Synthroid?

There may be many symptoms of hypothyroidism, or an underactive thyroid according to the Mayo Clinic. When symptoms aren’t treated they can become severe. Symptoms could include:

  • Fatigue
  • Weight gain
  • Depression
  • Thinning hair
  • Worsening memory
  • Pain in the joints
  • Increased sensitivity to cold

Hypothyroidism is tested by drawing blood. A diagnosis can be made by measuring the levels of TSH and thyroxine in your blood. A low level of thyroxine and a high level of TSH indicate an underactive thyroid, according to the Mayo Clinic. As Synthroid restores hormone levels, the symptoms of hypothyroidism, such as fatigue and weight gain, may be reversed, says the Mayo Clinic. Treatment with Sythroid is usually lifelong, but your dosage may change.

Medicare coverage of Synthroid and Synthroid cost

Medicare Part D offers prescription drug coverage through your choice of stand-alone Prescription Drug Plans or Medicare Advantage Prescription Drug plans, which offer the same benefits as Original Medicare combined with drug coverage.

To find out if a specific Medicare Prescription Drug Plan covers Synthroid or Levothyroxine, you will have to check the plan’s formulary. This is a drug list that details which medications are covered and how much they will cost you. These formularies will usually show brand-name drugs at higher prices than the same generic forms of drugs, so it’s a good idea to check with your doctor and see if you need Synthroid or Levothyroxine.

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Please note, the formulary may change at any time. You will receive notice from your plan when necessary.  Additionally, a Prescription Drug Plan’s formulary could change each year, so what the plan once covered or charged for a drug might change the next year.

Is generic Synthroid the same as Synthroid?

According to the Food and Drug Administration (FDA), generic medications (such as levothyroxine) must perform in the same way in the human body and have the same intended use as the brand-name medication (Synthroid). Generic Synthroid must also contain the same active ingredient, have the same strength, use the same dosage form and the same route of administration as the brand name Synthroid. According to the FDA, generic prices are sometimes 85% less than the brand-name.

I’m happy to answer your questions about Medicare drug coverage, or help you find a Medicare plan. Or use the links below to schedule a phone appointment or have me email you with more information. You can also compare Medicare Prescription Drug Plans now by using the Compare Plans buttons on this page.


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