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Custom Formulary

The Custom Formulary is used with triple-tier copayment or closed (managed) formulary plans only. If you're not sure whether your plan uses the Custom Formulary, check your prescription drug benefit packet or contact customer service.



Use our Custom Formulary Lookup Tool to see the current tier of any drug in our Custom Formulary.


Drugs in our Custom Formularies are categorized as follows:

Tier 1 — Generic
These drugs have a proven record of safety and effectiveness and offer the best value. Tier 1 drugs require the lowest copayment, making them your most cost-effective option for treatment. All generic drugs are Formulary Preferred.
Tier 2 — Formulary (Preferred) Brand
These brand-name drugs also have a record of safety and effectiveness. Because more cost-effective therapy or a generic alternative is usually available, drugs in Tier 2 require a higher copayment.
Tier 3 — Nonformulary (Nonpreferred) Brand
Nonformulary brand-name drugs are not included in our Custom Formulary. Tier 3 drugs may not have a proven record for safety or their clinical value may not be as high as the drugs in Tier 1 or Tier 2. Formulary alternatives are available. Depending on your plan's drug rider, you may pay a higher copayment for Tier 3 drugs than for those in Tier 1 or Tier 2, or even be responsible for the entire cost.


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