Medicare Part D Prescription Cost Estimator

Medicare Part D is prescription drug coverage that is offered to everyone with Medicare Part A and Medicare Part B. Patients are eligible for Medicare Part D if they already have health insurance through the Medicare program.

Patients can enroll in a Medicare Part D plan at any time if they are eligible and not currently enrolled. Patients can also change plans during the open enrollment period. According to, open enrollment dates for plans are October 15 through December 7 annually.

Medicare Part D coverage FAQs

What is a Medicare Part D patient's cost for Jakafi?

Medicare Part D cost shares for Jakafi vary depending on the benefit structure of the plan in which you are enrolled and where you are in the benefit cycle. If you have Medicare Part D and can’t afford Jakafi, we can refer you to an independent nonprofit organization or foundation that may be able to help.

Who can I contact to help me figure out my Medicare Part D coverage for Jakafi?

An IncyteCARES oncology certified nurse can help you determine your out-of-pocket cost for Jakafi. You can call toll-free at 1-855-4-Jakafi (1-855-452-5234) Monday through Friday, 8 am to 8 pm, ET. You can also contact an IncyteCARES nurse through email or by using the comment box on this page.

Patients who have commercial or private healthcare insurance (eg, BCBS, Aetna) can contact their insurance provider about their Medicare Part D coverage for Jakafi.

Estimate coverage for an oral oncology medication

The Prescription Cost Estimator below can show how the Medicare Part D prescription drug plan may help pay for an oral oncology medication such as Jakafi.

Coverage amounts shown are based on Medicare Part D data effective January 2019 through December 31, 2019.

Please note that the costs shown below are based on a hypothetical oral oncology medication. They are used for example only and are not intended to represent the actual costs of Jakafi.

To work the Prescription Cost Estimator, just click or tap the buttons showing the stages of Part D coverage. Medicare Part D coverage will change depending on the total cost of medications. During each stage of coverage, patients will pay a certain amount for their medications.

To work the Prescription Cost Estimator, just click or tap the buttons showing the stages of Part D coverage. Medicare Part D coverage will change depending on the total cost of medications. During each stage of coverage, patients will pay a certain amount for their medications.
Initial Coverage
Coverage Gap
























Medication Cost Summary


Hypothetical Example


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Indications and Usage

Jakafi is a prescription medicine used to treat people with polycythemia vera who have already taken a medicine called hydroxyurea and it did not work well enough or they could not tolerate it.

Jakafi is also used to treat certain types of myelofibrosis.

Important Safety Information

Jakafi can cause serious side effects, including:

Low blood counts: Jakafi® (ruxolitinib) may cause your platelet, red blood cell, or white blood cell counts to be lowered. If you develop bleeding, stop taking Jakafi and call your healthcare provider. Your healthcare provider will perform blood tests to check your blood counts before you start Jakafi and regularly during your treatment. Your healthcare provider may change your dose of Jakafi or stop your treatment based on the results of your blood tests. Tell your healthcare provider right away if you develop or have worsening symptoms such as unusual bleeding, bruising, tiredness, shortness of breath, or a fever.

Infection: You may be at risk for developing a serious infection during treatment with Jakafi. Tell your healthcare provider if you develop any of the following symptoms of infection: chills, nausea, vomiting, aches, weakness, fever, painful skin rash or blisters.

Skin cancers: Some people who take Jakafi have developed certain types of non-melanoma skin cancers. Tell your healthcare provider if you develop any new or changing skin lesions.

Increases in cholesterol: You may have changes in your blood cholesterol levels. Your healthcare provider will do blood tests to check your cholesterol levels during your treatment with Jakafi.

The most common side effects of Jakafi include: low platelet count, low red blood cell counts, bruising, dizziness, headache.

These are not all the possible side effects of Jakafi. Ask your pharmacist or healthcare provider for more information. Tell your healthcare provider about any side effect that bothers you or that does not go away.

Before taking Jakafi, tell your healthcare provider about: all the medications, vitamins, and herbal supplements you are taking and all your medical conditions, including if you have an infection, have or had tuberculosis (TB) or have been in close contact with someone who has TB, have or had hepatitis B, have or had liver or kidney problems, are on dialysis, had skin cancer, or have any other medical condition. Take Jakafi exactly as your healthcare provider tells you. Do not change your dose or stop taking Jakafi without first talking to your healthcare provider. Do not drink grapefruit juice while on Jakafi.

Women should not take Jakafi while pregnant or planning to become pregnant, or if breast-feeding.

Please see Full Prescribing Information, which includes a more complete discussion of the risks associated with Jakafi.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit, or call 1-800-FDA-1088.

You may also report side effects to Incyte Medical Information at 1-855-463-3463.