Health Care & Benefits Division

Mail order service offers an easy way for you to get a 90-day supply of your long-term or maintenance medications. The State Plan has access to three mail order service vendors under the Navitus prescription drug program. 

90-day fill at retail pharmacies: Members can also fill 90-day supplies of certain maintenance medications at participating retail pharmacies. For more information, commercial plan members can visit Navitus Health Solutions, and Medicare-eligible retirees can visit Navitus MedicareRx

Navitus Health Solutions partners with the following mail order vendors: 

  • Costco Pharmacy
  • miRx Pharmacy
  • Ridgeway Pharmacy 

To begin using mail order services, see the below contact information for each vendor.

Costco Pharmacy
You do NOT need to be a Costco member to use Costco mail order.
Mail:  802 134th St. SW, Suite 140, Everett, WA 98204-9935
Phone: 800-607-6861
Fax: 800-633-0334
Hours: Monday - Friday, 6 am - 8 pm (MST) and Saturday, 10:30 am - 3 pm (MST)


miRx Pharmacy
Mail: 993 S. 24th St. West, Suite A, Billings, MT  59102
Phone: 866-894-1496 or 406-869-6551
Fax: 406-869-6552
Hours: Monday - Friday, 9 am - 5 pm (MST) and Saturday, 9 am - 12 pm (MST)

Mail: 2824 US Hwy 93 N, Victor, MT 59875
Phone: 800-630-3214
Fax: 406-642-6050
Hours: Monday - Thursday, 9 am - 5 pm (MST), and Friday, 9am - 3pm (MST)





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