
A formulary is a list of prescription medications covered by a health insurance plan. It is also known as a preferred drug list (PDL) and is divided into tiers based on the type of drug, with cheaper generic drugs usually occupying the lower tiers and more expensive, specialty drugs in the higher tiers. Formularies are typically created by a committee of doctors and pharmacists, who approve drugs based on safety, quality, and cost-effectiveness. They are designed to help manage which drugs care providers can prescribe and ensure that the drugs covered by a health plan are safe, effective, and reasonably priced.
| Characteristics | Values |
|---|---|
| Definition | A formulary is a list of prescription drugs covered by a health insurance plan. |
| Tier System | Formularies are divided into tiers, usually three to five, based on the type of drug and cost. Lower tiers are cheaper and include generic drugs, while higher tiers are more expensive and include specialty drugs. |
| PDL | PDL stands for Preferred Drug List. PDLs categorize drugs into tiers and provide information on coverage requirements such as Prior Authorization and Step Therapy. |
| Formulary Changes | Formularies typically change at the start of each calendar year but can also be updated throughout the year when new drugs become available or are deemed harmful by the FDA. |
| Non-Formulary Drugs | If a prescription drug is not on the formulary, it may be considered a non-formulary drug, and the patient may have to pay out of pocket. However, insurers often have an "exceptions process" to request coverage for non-formulary drugs. |
| Formulary Management | Formulary selection involves assessing clinical performance and relative cost. Formularies help control costs for payers and provide leverage in negotiations with drug manufacturers. |
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What You'll Learn
- Formularies are lists of drugs covered by health insurance plans
- Formularies are divided into tiers based on drug type
- PDLs (Preferred Drug Lists) help patients pay the lowest price for drugs
- Non-formulary drugs can be covered through an insurer's exceptions process
- Formularies are updated annually and throughout the year

Formularies are lists of drugs covered by health insurance plans
A formulary is a list of drugs covered by a health insurance plan. Formularies are also referred to as preferred drug lists (PDLs). They are typically created by a committee of doctors and pharmacists, who work together to ensure the formulary is based on safety, effectiveness, and overall value. The PDL categorises drugs into tiers, usually three to five, based on how much they cost. Drugs on Tier 1 are the cheapest and are often generic versions of brand-name drugs found in higher tiers.
The purpose of a drug formulary is to help manage which drugs can be prescribed and covered by a health plan. The goal is to ensure that the drugs covered by a health plan are safe, effective, and available at a reasonable cost. Formularies vary from plan to plan, and it is important to check if your medications are listed on the formulary before enrolling in a health plan. If a prescription drug is not on your health plan's formulary, you will likely have to pay for it out of pocket, which can be very expensive.
Health plans update their formularies annually and make changes throughout the year when new drugs become available or when the FDA decides a drug is harmful. Formularies may also change at the start of each calendar year. It is important to stay up-to-date with formulary changes and share the most current formulary list with your doctor, especially if cost is a concern. By understanding your PDL, you can work with your doctor to find lower-cost alternatives or request coverage for non-formulary drugs through the exceptions process.
The PDL includes other important information about your coverage, such as prior authorization, step therapy, and quantity limits. It is worth noting that formularies may have high cost-sharing formulas in the specialty tiers, which can be a financial burden for patients requiring specialty drugs. Additionally, formularies can impact cost control in Medicare Part D and most private insurance plans, as they limit coverage for drugs that do not demonstrate adequate clinical differentiation or benefit to justify the cost.
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Formularies are divided into tiers based on drug type
A formulary is a list of generic and brand-name prescription medications covered by a specific health insurance plan. It is also referred to as a Preferred Drug List (PDL). The purpose of a formulary is to help manage which drugs can be prescribed and covered by a health plan. The goal is to ensure that the drugs covered by a health plan are safe, effective, and available at a reasonable cost.
Formularies are typically developed by healthcare professionals, such as doctors and pharmacists, who evaluate the effectiveness, safety, and cost of medications for different medical conditions. The formulary committee approves the drugs on a health plan's formulary based on safety, quality, and cost-effectiveness.
Formularies are divided into tiers or levels of coverage, usually three to five, based on the type of drug. Each tier represents a different cost level, with drugs in lower tiers costing less and those in higher tiers costing more. Tier 1 drugs are typically generics and have the lowest copays, while Tier 2 includes non-preferred generics and brand-name drugs, costing more than Tier 1 medications. Tier 3 consists of generics, preferred brands, and non-preferred brands, with higher out-of-pocket prices. Tier 4 includes specialty drugs that treat rare or serious medical conditions and have the highest out-of-pocket costs. It's important to note that the number of tiers and the drugs placed within each tier can vary across different insurance companies and plans.
Understanding your health insurance plan's formulary is crucial, as it can significantly impact your prescription drug costs. By reviewing the formulary tiers and discussing options with healthcare professionals, you can make informed decisions about your prescriptions and manage your healthcare expenses effectively.
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PDLs (Preferred Drug Lists) help patients pay the lowest price for drugs
A formulary is a list of prescription medications covered by a health insurance plan. It is divided into tiers, with drugs on lower tiers costing less. If a prescription medication is not included in a patient's insurance plan formulary, they may have to pay for it out of pocket. This can be costly, so it is important for patients to check that any prescription medicines they need are listed on the formulary before enrolling in a health plan.
Preferred Drug Lists (PDLs) are formularies that help patients pay the lowest price for the drugs they need. PDLs are often divided into three to five tiers, with Tier 1 being the cheapest and usually consisting of generic drugs. The drugs on a PDL are determined by a committee of health professionals, including doctors and pharmacists, who regularly reassess the list to add, remove, or swap out prescription drugs as necessary. PDLs are designed to provide a wide range of options that are covered by insurance, minimising out-of-pocket costs for patients.
PDLs can also help employers, as a PDL with a good mix of generic and brand-name drugs can result in better benefits for their employees. However, the use of PDLs has been controversial, with some arguing that it creates a conflict between quality and cost. For example, if a patient's medication is in a higher tier, they may need to try cheaper drugs first to see if they work, which could be a health risk. Additionally, PBMs that rely on discount-based models may not always result in the best price for employers and insurers.
Despite these concerns, PDLs can be beneficial for patients, especially when coupled with pharmacy benefit managers (PBMs). PBMs help ensure that the drugs on PDLs are cost-effective and accessible, and they can assist health insurers and employers in making the drugs on a PDL more affordable. Overall, by understanding their PDL, patients can work with their doctors and insurers to access the crucial drugs they need at the lowest possible price.
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Non-formulary drugs can be covered through an insurer's exceptions process
A drug formulary is a list of generic and brand-name prescription medications covered by a health insurance plan. Formularies vary from plan to plan and are typically divided into tiers based on the type of drug, with lower tiers costing less. Insurers may choose not to cover a prescription drug if there is a generic version available, if it is less effective than similar drugs, or if it is more expensive than its counterparts.
If a prescription drug is not included in an insurance plan's formulary, it is considered a non-formulary drug. In this case, the enrollee may have to pay out of pocket for the medication. However, non-formulary drugs can sometimes be covered through an insurer's exceptions process. Each insurer has a unique exceptions process, but they typically share some commonalities. For example, the enrollee's healthcare provider must confirm that the prescribed drug is necessary for their treatment and that the plan's covered drugs will not be as effective or may be harmful.
To initiate the exceptions process, the enrollee, their representative, or their prescriber may submit a formulary exception request. This request may be made by filling out and mailing paperwork or submitting a form online. For formulary exceptions, the prescriber must provide a supporting statement indicating that the non-formulary drug is necessary for treating the enrollee's condition. They must also explain that all covered drugs would be less effective or have adverse effects. This statement can be submitted verbally or in writing, and if submitted verbally, a follow-up in writing may be required.
The likelihood of being granted a medical exception depends on the drug's competitive landscape and the patient's severity of disease. If a patient is very ill and the selected drug is more beneficial than other available drugs, the non-covered drug is more likely to be approved. Patient preference, clinical history, and willingness to advocate for themselves can also play a role in the approval process. If a payer initially denies the request, the physician can appeal the decision.
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Formularies are updated annually and throughout the year
A formulary is a list of generic and brand-name prescription medications covered by a health insurance plan. The list is divided into tiers based on the type of drug, with drugs in lower tiers costing less than those in higher tiers. Formularies are created by a committee of doctors and pharmacists, who work together to ensure the list is based on safety, effectiveness, and overall value.
It is important for individuals to stay up-to-date with formulary changes, especially if they are taking medications that require prior authorization or step therapy. By regularly reviewing the formulary, individuals can ensure that their medications are still covered and identify any alternatives that may be available at a lower cost. Additionally, understanding the formulary can help individuals make informed decisions when choosing a health insurance plan that best suits their needs.
Insurers may also make changes to the formulary to manage their drug costs. For example, they may increase drug deductibles, copays, or coinsurance levels, especially for non-preferred brand and specialty drugs. These changes can impact an individual's out-of-pocket expenses, making it crucial to stay informed about any updates to the formulary throughout the year.
Furthermore, formularies may be updated to reflect new clinical guidelines or treatment regimens. As medical knowledge evolves, certain drugs may become preferred or discouraged based on their clinical performance, relative cost, and overall value. By staying informed about formulary updates, individuals can ensure they have access to the most effective and cost-efficient medications available under their health insurance plan.
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Frequently asked questions
A formulary is a list of generic and brand-name prescription drugs covered by a specific health insurance plan. It is also known as a preferred drug list (PDL).
A PDL categorizes drugs into tiers, usually three to five, based on how much they cost. Drugs on Tier 1 are the cheapest and are often generic versions of brand-name drugs in higher tiers.
The purpose of a formulary is to help manage which drugs care providers can prescribe and that would be covered by a health plan. The goal is to ensure that the drugs covered by a health plan are safe, effective, and available at a reasonable cost.


































