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Preferred Formulary

Preferred Formulary Reference Guide

The Preferred Formulary Guide will help you understand and use your pharmacy benefits. It contains a list of medications your plan covers – and how much you might owe out of pocket. The drugs on this list are chosen based on many factors, including safety, effectiveness and cost – then they are divided into three drug tiers.

A panel of physicians and pharmacists regularly reviews and revises the list of drugs to reflect availability of new prescription drugs and other changes in the market.

Coverage Requirements and Limitations

To make sure that prescription drugs are used safely and cost effectively, some drugs have additional requirements that must be met before the prescription can be filled. Those drugs will have an abbreviation next to the drug name to let your doctor or pharmacist know there are additional requirements.




Prior Authorization: The plan requires your physician to obtain prior authorization for certain drugs based on medical criteria. This means that your physician will need to get approval before you may fill your prescription.


Quantity Limits: For certain drugs, the plan limits how many doses you can get. This applies to drugs that are often taken the wrong way or are often taken in greater quantities than prescribed.


Step Therapy: In some cases, your plan requires you to first try certain drugs to treat your medical condition before covering another drug for that condition.

2019 Preferred Formulary Reference Guide

What's Changing on the Preferred Formulary for 2019?

What’s a Drug Tier?

The drug list includes three tiers of medications: generic, preferred brand-name drugs and non-preferred brand-name drugs. There’s also a Specialty Drug tier. The copay, deductible or coinsurance for your prescription is based on which tier your drug falls into. The lower the tier, the lower your cost share will be.

Tier 1 – Generic Drugs

Lower Cost $

Tier 1 includes generic drugs offer the lowest member copayment. The active ingredient in a generic drug is chemically identical to the active ingredient of the corresponding brand name drug.

Tier 2 – Preferred Brand Drugs

Mid-Range Cost $$

Tier 2 drugs are usually available at a slightly higher copay or coinsurance than generic drugs. These drugs are designated preferred brand because they’ve been proven to be safe, effective and priced favorably compared to other brand drugs that treat the same condition.

Tier 3 – Non-Preferred Brand Drugs

Higher Cost $$$

Tier 3 drugs have the highest copay or coinsurance. These drugs are listed as non-preferred because they haven’t been found to be any more cost effective than available generics, preferred brands or over-the-counter drugs.

Tier 4 – Specialty Drugs

Higher Cost $$$$

The Specialty Pharmacy Program includes high-cost medications for serious chronic diseases such as hepatitis C, multiple sclerosis, arthritis and hemophilia.

After your provider prescribes one of these medications, it should be ordered from one of BlueCross BlueShield of Tennessee's preferred specialty pharmacy vendors.

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