Your Caterpillar prescription drug benefit offers you the convenience of using retail pharmacies, mail order pharmacy services through Walgreens Mail Service, and specialty pharmacy services through Prime Therapeutics Pharmacy.
Our prescription drug plan includes a formulary, a list of covered medications. The formulary is updated quarterly with changes, additions, or removals.
Click the quarterly update link below for the latest formulary updates.
Note: If your medication isn’t listed on the formulary, you may want to ask your doctor for alternative medications that are covered under the plan.
Retail pharmacies
Network pharmacies provide the best value. Caterpillar has negotiated aggressive pricing agreements to lower prescription medication costs and provide transparency. Use In-Network pharmacies listed below to maximize your benefits and avoid higher costs at out-of-network pharmacies.
*If you're prescribed a Tier 1 medication, you'll benefit by filling your prescription at Walmart or Kroger (or their affiliates) to receive the medication at a lower copay amount.
To locate In-Network pharmacies near you, visit or contact:
Mail order (home delivery)
Walgreens Mail Service is Caterpillar's home delivery service, Walgreens Mail Service brochure. Home delivery service may be right for you or a covered family member if your physician prescribed a maintenance medication and anticipates long-term use, you are stabilized on a given dosage, you travel often or have difficulty getting to a retail pharmacy. Maintenance medications treat conditions such as high blood pressure, arthritis, heart ailments or diabetes. Order up to a 90-day supply online, by phone, or by mail
Mail order refills can be requested 24/7 online or by phone. Be sure to have the prescription number, store number, and credit card information ready. This information can be found on the prescription bottle label.
Specialty pharmacy
Certain high-cost prescription medications treat complex conditions and require special handling. Medications on the Specialty Product List must be purchased through Prime Therapeutics Pharmacy. For more information, contact Prime Therapeutics Pharmacy at 1-866-554-2673.
Certain medications require prior authorization. A set of criteria must be met, and a drug-specific form must be completed for coverage consideration. Once a coverage determination has been made, the member and physician will be notified.
Click here to view the list of Prior Authorization Forms.
