Yes, most employer-sponsored and individual health insurance plans in the United States include prescription drug coverage. Under the Affordable Care Act (ACA), prescription drugs are one of ten essential health benefits, which means plans sold in the individual and small-group markets must include this coverage. Large employer and self-funded plans are not required to, though nearly all do. The scope of that coverage, meaning which drugs are covered, what you pay, and where you can fill them, is set by a system called a drug formulary. Learning how a formulary works helps you avoid surprise costs.
What is a Drug Formulary?
A drug formulary is the plan's approved list of prescription medications. Developed by the health plan or a pharmacy benefits manager (PBM) with input from doctors and pharmacists, the formulary sorts drugs into tiers that determine your out-of-pocket costs. The tiers work like a pricing menu: generic drugs are typically the most affordable (Tier 1), followed by preferred brand-name drugs (Tier 2), non-preferred brand-name drugs (Tier 3), and specialty drugs (Tier 4 or 5), which are usually the most expensive. You can find your plan's formulary on the insurer's website or member portal, usually searchable by drug name. Check it before you fill a new prescription so the tier and your share of the cost do not come as a surprise.
How Formularies Work and Impact Your Costs
The formulary is how a plan controls drug costs and your share of them.
- Tiered Copayments/Coinsurance: Your cost-share is determined by the drug's tier. Lower tiers carry small copays, while top tiers often require coinsurance, where you pay a percentage of the drug's list price.
- Prior Authorization (PA): For certain expensive or potentially misused drugs, your doctor must provide documentation to the plan proving medical necessity before coverage is approved.
- Step Therapy: Also known as fail first, this protocol requires you to try a lower-cost drug, typically a generic, before the plan covers a more expensive alternative.
- Quantity Limits: Restrictions on how much medication you can get within a certain timeframe (for example, 30 pills per month) to keep dosing in check and control costs.
- Pharmacy Network: Plans have preferred pharmacies (retail, mail-order). Using an in-network pharmacy ensures you pay the contracted rate; going out-of-network usually means higher costs or no coverage at all.
What to Do When a Drug Is Not Covered
When a prescribed drug is not on the formulary or sits on a high tier, you have options. Your prescriber can request a formulary exception, which asks the plan to cover a non-formulary drug, or a tiering exception, which asks the plan to charge the lower cost-sharing amount that applies to preferred drugs. The request must explain why the covered alternatives would not be as effective or would cause harm. Plans must respond to standard exception requests within 72 hours, and to urgent requests faster. If the plan denies the request, you can appeal internally and then ask for an external review by an independent reviewer, a right ACA-governed plans must provide. The forms and deadlines are in your plan's member materials.
The Growing Problem with Traditional PBM & Formulary Models
Formularies are standard, but the traditional PBM model has documented problems. It draws criticism for opaque pricing, rebate schemes, and spread pricing, in which the PBM charges the health plan more for a drug than it reimburses the pharmacy and keeps the difference. That misalignment can lead to:
- Higher premiums and out-of-pocket costs for employers and employees.
- Formulary decisions driven by PBM profit from rebates rather than health outcomes.
- Frustration for members and physicians when effective medications are placed on high tiers or require lengthy approval processes.
Regulators are now pushing back. In February 2026, Congress included pharmacy benefit manager reform provisions in the Consolidated Appropriations Act, and the Federal Trade Commission has reached settlements with major PBMs over rebating practices. WellthCare™, the first Health-to-Wealth™ Benefit System, addresses the same problem by aligning pharmacy incentives with employee health and financial rewards.
A Modern, Aligned Alternative: The WellthCare Ecosystem Approach
How a Health-to-Wealth System Transforms Drug Coverage
A WellthCare plan treats prescription drug coverage as an integrated part of the benefit, designed for health and savings. Key differentiators include:
- Transparent Pharmacy Economics: WellthCare Pharmacy™ replaces the traditional PBM with a direct model that works on a cost-plus basis, with no spread pricing or rebate games. Drug costs can drop 20 to 40 percent.
- Formularies Aligned with Health Outcomes: Formularies are built around health outcomes rather than rebate profits. Medication recommendations tie into your personalized plan of care, improving adherence and outcomes.
- Access and Adherence Tools: Integrated apps provide medication reminders, easy refills, and upfront pricing, which helps you stay on track and reduces downstream claims.
- Data-Driven Optimization: Tools like the WellthCare Readiness Index™ analyze real usage and pricing data to show employers what they would save by switching.
Standard health benefits do cover prescription drugs through a formulary system. Integrated models that align incentives go further. Better pharmacy care lowers overall costs, improves health, and supports employees' wealth-building. That changes prescription coverage from a cost to manage into a benefit people use and value.
See what a WellthCare Plan would look like for your team.