Mail Order Drugs

Get Your Prescriptions Delivered to Your Door!

You can get many of your Medicare Part D drugs sent to your home through mail. We work with Express Scripts® to offer these services to you. When you use these services, your eligible Medicare Part D drugs are mailed to your home. There is no charge for shipping if you use regular delivery. Below are some of the benefits of having your prescriptions delivered!

  • Convenience. Ordering is easy and your medicines are sent right to your home.
  • Quality and safety. Dedicated pharmacists look over each prescription to make sure it is correct. They also check to make sure you aren’t taking drugs that shouldn’t be taken together.
  • Guidance. If you have questions, you can call a pharmacist or technician for help 24 hours a day, 7 days a week. Call 1-833-230-2073 to speak with a pharmacist today! We are open 9 a.m. to 5:30 p.m. Monday through Friday.
  • Easy Refills. You can order refills by phone or online. It’s always a good idea to order your refills at least two weeks before your medicine runs out.

Can I Get My Drugs Through the Mail?

Please be aware that some Part D drugs are not available through the mail order service. If a drug can be ordered through the mail, you will see the letters “MO” next to the drug name in our online Preferred Drug Listing, or Formulary. This stands for mail order drug.

How to Get Started

If you already have a prescription, choose one of the following ways to send it:

  • Ask your doctor to call it in to 1-888-327-9791.
  • Ask your doctor to fax it to 1-800-837-0959.
  • Call a CareSource pharmacist at 1-833-230-2073 for help. We are open 9 a.m. to 5:30 p.m. Monday through Friday.
  • Mail it and a completed Mail Order form to:

Home Delivery Service
P.O. BOX 66577
St Louis, MO 63166-6577

You can also call ESI to ask for a Mail Order form.

  • Phone: 1-800-351-0567

If you need a prescription, you can:

  • Call ESI from 8 a.m. to 8 p.m. Eastern Standard Time (EST), Monday – Friday.
  • Go online to and sign in or register.

Please make sure you have your CareSource member ID card and the names of your medicines. You will also need your doctor’s name and phone number.

Note: You must order at least a 30-day supply of the drug and no more than a 90-day supply.

Automatic Refill Service

CareSource Dual Advantage allows members to use an “automatic refill” service for their mail-order drugs. We will need your permission before we can send you a refill by mail. That way we make sure you get only the drugs you need.

Delivery Time

Please allow up to 10 days from the time you place your order to receive delivery. If your mail order is delayed, please call ESI at 1-800-351-0567 to check on it. You can also check online at Just sign in and provide an order number, Rx number or member information.

Use a Network Pharmacy

If you use a mail order pharmacy that is not in the CareSource Dual Advantage network, your drug will not be covered. If you have a drug that requires preauthorization and you would like to use the mail-orders, our mail-order pharmacy will call your doctor. If your prescription is rejected or the drug is out of stock, our mail-order pharmacy will contact you and mail-order pharmacy will make sure you get a temporary supply through a local retail pharmacy until your mail order request is completed.

To learn more about the mail-order service, please call our Member Services department at 1-833-230-2020 (TTY: 711). We are open 8 a.m. to 8 p.m. Monday through Friday, and from October 1 through March 31 we are open the same hours, seven days a week.

This information is not a complete description of benefits. Call Member Services for more information.

The Formulary, pharmacy network and/or provider network may change at any time. You will receive notice when necessary.