To answer your question, I have reviewed the provided sources, which include the Vascepa website, a page on the Mayo Clinic's website about cholesterol medications, and a drug patent watch website. While the sources do not provide a comprehensive list of required documents for Vascepa patient assistance, I can provide some general guidance based on the information available.

Vascepa, a prescription medication used to treat high levels of triglycerides in the blood, is often subject to financial assistance programs to help eligible patients cover its cost. The specific documents required for such assistance can vary depending on the program. However, generally, patients may be asked to provide the following:

1. Proof of income: This can include tax returns, pay stubs, or a letter from your employer stating your income. Some programs might require only the most recent documents, while others might ask for year-to-date information.

2. Insurance information: Patients should be prepared to provide their insurance cards or policy details. This information helps the patient assistance program understand the patient's coverage and any potential out-of-pocket costs.

3. Prescription information: Details about the Vascepa prescription, such as the dosage and prescribing physician, might be required.

4. Proof of U.S. residency: Some programs might ask for proof of U.S. residency or citizenship, which can include a driver's license, passport, or other government-issued identification.

5. Completed application forms: Patients will likely need to fill out and submit an application form provided by the patient assistance program. This form might ask for the aforementioned information and any additional details required by the program.

It is important to note that the specific documents and application process may vary between patient assistance programs. Patients seeking Vascepa patient assistance should consult the program's guidelines or contact the program directly for detailed instructions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/VASCEPA
[2] https://www.vascepa.com/
[3] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/cholesterol-medications/art-20050958