Why Does My Insurance Cover the Brand Name But Not the Generic, Or Vice Versa?

Why Brand Names Are Sometimes Cheaper Than Generics Under Insurance

We touched on this in our earlier post about generics costing more than brand names. Here is the full explanation.

Pharmaceutical manufacturers pay rebates to Pharmacy Benefit Managers in exchange for preferred formulary placement. A brand name drug manufacturer whose product faces generic competition has a strong financial incentive to pay a substantial rebate to maintain preferred formulary tier status, because preferred tier placement means patients are directed toward the brand rather than the generic, preserving market share that would otherwise be lost to the lower cost alternative.

When the rebate is large enough, the PBM places the brand on Tier 1 or Tier 2 with a low copay. The generic, which has no rebate relationship, lands on a higher tier or in some cases is classified as non preferred and carries a higher copay or is not covered at a preferred rate at all.

The result is what you experienced: the brand costs $15 and the generic costs $45. The insurance plan’s overall cost may actually be lower because of the rebate the brand manufacturer is paying, but the patient’s out of pocket cost is higher for the generic. The system has been optimized for the plan’s finances and the PBM’s revenue. The patient’s copay is a secondary consideration.

Why Generics Are Sometimes Not Covered When the Brand Is

There is a second scenario where generics are less covered than brands, and it involves formulary design decisions that favor therapeutic categories where manufacturers pay larger rebates.

In some therapeutic categories, particularly psychiatry, cardiovascular medications, and newer chronic disease treatments, formularies are designed around specific brand name agents for which manufacturers have negotiated preferred placement. Generics from competing drug classes may be excluded or placed on non preferred tiers not because they are clinically inferior but because the brand manufacturer in the preferred slot paid for that placement.

This is particularly visible in newer medication classes where no generic exists for the most heavily marketed product. When a patient is prescribed a brand name medication in a category where only brands are available, the formulary tier placement determines whether that medication is affordable, and that placement is determined by rebate negotiations that have nothing to do with the patient’s clinical needs.

Why the Brand Name Your Doctor Prescribed Is Sometimes Not Covered

When your physician prescribes a specific brand name medication that your insurance plan does not cover at a preferred tier, or requires prior authorization for, it is usually because that brand is not in the preferred rebate relationship with your plan’s PBM.

Your physician prescribed what they believe is clinically appropriate for you. The formulary covers what the PBM has negotiated. When these do not align, you are caught in the middle.

The options in this situation are:

Formulary exception request. Your physician can submit a formulary exception request to your insurance plan documenting the clinical reasons why the specific prescribed medication is necessary and why the preferred formulary alternative is not appropriate for your situation. Plans are required to have a process for reviewing these requests. Approval is not guaranteed but is more likely when the physician provides specific clinical documentation.

Prior authorization. For some non preferred medications your plan may cover the medication after a prior authorization is approved. Prior authorization requires your physician to submit documentation of medical necessity. We will cover the prior authorization process in detail in our next post.

Therapeutic substitution. Ask your physician whether a formulary preferred alternative is clinically appropriate for your condition. In many cases a different medication in the same drug class that is on the preferred tier will provide equivalent clinical benefit at lower cost to you. Your pharmacist can identify the preferred formulary alternatives and communicate them to your prescribing physician.

Manufacturer copay assistance. For brand name medications that are not covered at a preferred tier, the manufacturer may offer a copay assistance program that reduces your out of pocket cost. This option is available for commercially insured patients, not Medicare or Medicaid, and can sometimes reduce a non preferred brand copay to zero or near zero.

Appeal the coverage decision. If your plan denies coverage for a prescribed medication or places it on a non preferred tier in a way that you believe is clinically inappropriate, you have the right to appeal. Your physician’s clinical documentation is the key evidence in any coverage appeal.

The Specific Situation Where You Should Always Ask Questions

The situation that warrants the most attention is when your physician prescribes a brand name medication and your pharmacist tells you it is not covered, or is covered only at a very high copay, without explaining your options.

At that moment you have several choices. You can pay the high price. You can go back to your physician and ask about alternatives. You can ask your pharmacist to identify the preferred formulary alternatives. You can request a prior authorization. You can look for a manufacturer copay card.

None of these options will present themselves automatically. You have to ask. And the pharmacist is the fastest and most accessible first resource for understanding which of these paths is most likely to work for your specific situation.

The Honest Bottom Line

Insurance formularies are not designed to ensure that every patient receives the clinically optimal medication at the lowest possible cost. They are designed to manage the insurance plan’s overall drug spend using rebate economics that sometimes align with patient interests and sometimes do not.

Understanding this does not change the system. But it changes how effectively you can navigate it, and navigating it effectively can make the difference between an affordable medication and one that costs more than your electric bill.

This article is for general information only and is not a substitute for personalized medical advice. Before starting or changing any medication, including over the counter products and supplements, talk with your pharmacist or physician about your specific situation.