If you’re an employer or HR admin fielding questions from staff about prescription drug coverage, you’ve likely stared at a dense, jargon-heavy formulary document with no clear starting point. A wrong answer about coverage can leave an employee stuck with an unexpected bill, or create compliance risks for your business. This resource breaks down how to look up drug coverage consistently, document what you find, and communicate clearly with your team without guessing. The included checklist lets you standardize every lookup so you don’t miss critical details every time.
Formulary Lookup Checklist
☐ Confirm I am referencing the formulary for the correct plan year and plan tier (e.g., PPO vs. HMO, high-deductible vs. standard)
☐ Look up the drug by both brand name and generic active ingredient to check for covered alternatives
☐ Note the drug’s tier level, and any associated cost-sharing (copay, coinsurance, deductible applicability)
☐ Check for step therapy requirements (must try lower-cost drugs first before coverage applies)
☐ Check for prior authorization requirements (provider must submit approval request before coverage applies)
☐ Check for quantity limits (maximum number of doses/pills covered per 30/90 day window)
☐ Note if the drug is excluded entirely from coverage, and if there is an appeals process listed
☐ Cross-reference any mail-order coverage rules for 90-day supplies, if applicable
☐ Confirm if coverage applies to in-network only pharmacies, or if out-of-network is allowed
What to ask a broker or carrier
Before you do a deep dive into a formulary for a specific employee request, start by confirming basic context with your licensed broker or plan carrier representative. Many employers overlook that formularies are updated multiple times per year, and the printed version you received at open enrollment may not reflect recent changes to covered drugs, tiering, or restrictions. You’ll also want to confirm if your plan has any state-mandated drug coverage requirements that may supersede the printed formulary, such as coverage for certain mental health medications, insulin, or fertility treatments, depending on your location. This initial check ensures you’re not working from outdated or incomplete information before you answer an employee’s question. If you use a carrier’s online formulary portal, confirm that you have selected the correct group number for your company’s plan, as many carriers host formularies for hundreds of employer groups on the same platform.
Question list
The following core questions are the same for every formulary lookup, and align directly with the checklist above. When you look up any medication, you will need a clear answer to every question before you can share information with an employee.
First, is this drug covered at all under the employee’s specific plan? Formularies often cover multiple plan designs offered by the same carrier, so you need to filter to the exact plan your company offers, as well as the employee’s specific coverage tier if you offer multiple plan options.
Second, what cost-sharing will the employee pay? Cost-sharing can vary by tier, and may be a flat copay, a percentage of the drug cost (coinsurance), or full cost until the employee meets their deductible.
Third, are there any usage restrictions that apply? These most commonly include prior authorization, step therapy, and quantity limits, all of which require action from the employee’s provider before coverage kicks in.
Fourth, are there covered lower-cost alternatives? Most formularies will flag generic, biosimilar, or preferred brand alternatives that have the same active ingredient as a non-preferred drug, often at a much lower cost to the employee.
Fifth, is coverage available via mail order, and are there cost incentives for using 90-day supplies? Many plans offer reduced cost-sharing for mail-order maintenance medications, which is a useful detail to share with employees taking long-term drugs.
Illustrative example: If you are looking up a brand-name diabetes medication, you may find the generic version is tier 1 with a $10 copay, while the brand name is tier 3 with 30% coinsurance, and requires prior authorization to confirm no generic alternative works for the patient.
How to record answers
It is not enough to find the answer to an employee’s question and share it verbally. You need to keep a standardized record of every formulary lookup you complete, in case of disputes, coverage changes, or compliance audits.
First, note the full details of the request: the employee’s name, the drug name (brand and generic, if provided), the date of the request, and the specific plan the employee is enrolled in.
Second, record the source of the information you used: the date of the formulary document, the link to the online formulary if you used the carrier’s web portal, or the name of the carrier representative or broker you spoke with, plus the date and time of that conversation.
Third, write down all the key details you found: tier level, cost-sharing, any restrictions, covered alternatives, and applicable appeals processes if the drug is excluded or restricted.
Fourth, keep a copy of any relevant snippets of the formulary, or a screenshot of the online lookup result, stored in the employee’s confidential personnel file or your company’s benefits records. Make sure all records are stored in a HIPAA-compliant location, as prescription drug information is protected health information that cannot be shared with unauthorized staff.
What not to promise employees
Even if you complete the full checklist and confirm details with your carrier, there are limits to what you can promise employees about drug coverage, because final coverage decisions are always made by the plan carrier when the prescription is processed.
First, never promise that a drug will be 100% covered, or that an employee will pay a specific amount for the drug. Cost-sharing can change if the employee hasn’t met their deductible, if the drug is filled at an out-of-network pharmacy, or if the carrier updates the formulary mid-year. Instead, you can share the listed cost-sharing for the drug’s tier, and note that the final cost will be confirmed when the prescription is filled by their pharmacy.
Second, never promise that a prior authorization or step therapy exception will be approved. These requests are reviewed by the carrier’s clinical team, and approval depends on the employee’s specific medical history and provider documentation. You can share the process for submitting an exception request, but cannot speculate on approval odds.
Third, never advise an employee to switch medications or stop taking a prescribed drug to save money. That is medical advice, which you are not qualified to provide. You can share information about covered lower-cost alternatives, but always tell the employee to discuss any medication changes with their doctor.
Fourth, never tell an employee there is no way to appeal a denied coverage decision. All group health plans have formal appeals processes for drug coverage denials, which you can share with the employee, or help them connect with the carrier to learn more.
Bottom line
Reading a drug formulary does not have to be a guessing game if you use a standardized process for every lookup, confirm details with your broker or carrier, and document all your findings clearly. The checklist included here will help you avoid missing critical details that impact employee costs and coverage, and reduce the risk of sharing incorrect information with your team.
This resource is for educational purposes only, and is not insurance, tax, legal, or medical advice. Always verify all drug coverage details against your official Summary of Benefits and Coverage or other plan documents, or consult a licensed insurance broker before sharing information with employees.
Important note: This page is educational and is not insurance, tax, legal, or medical advice. Confirm current rules in your plan documents or with a licensed professional.