What Is True out-of-pocket (TrOOP)?

True Out-of-Pocket (TrOOP) costs refer to the expenses that a Medicare Part D enrollee personally pays for covered prescription drugs before reaching the catastrophic coverage phase. TrOOP is a crucial concept in Medicare Part D because it determines when a beneficiary qualifies for additional financial relief after surpassing a specific spending threshold.

Understanding TrOOP in Medicare Part D

Medicare Part D is designed to help beneficiaries manage the costs of prescription drugs, but it follows a structured payment system with different phases. TrOOP is specifically linked to these phases, particularly the transition from the coverage gap (also known as the “donut hole”) to the catastrophic coverage phase.

A beneficiary’s prescription drug costs begin accumulating at the start of the year. Initially, they pay a portion of the drug cost through deductibles and copayments or coinsurance. Once total drug spending (including what both the plan and the beneficiary have paid) reaches a certain limit, they enter the coverage gap. During this phase, the enrollee typically pays a higher percentage of their drug costs. However, once TrOOP spending reaches a federally determined threshold, the individual moves into catastrophic coverage, where their cost-sharing is significantly reduced for the remainder of the year.

What Counts Toward TrOOP?

TrOOP includes only certain out-of-pocket expenses directly paid by the enrollee or a qualified third party on their behalf. The key components that count toward TrOOP are:

• Deductibles: Any amount paid out-of-pocket before the plan begins covering drug costs.
• Copayments and Coinsurance: The portion of the cost the enrollee pays for covered drugs during the initial coverage and coverage gap phases.
• Discounts from Manufacturers: Under the Medicare Part D Coverage Gap Discount Program, pharmaceutical manufacturers provide a discount on brand-name drugs. The full discount amount (not just what the beneficiary pays) contributes to TrOOP.
• Payments Made by Certain Assistance Programs: Contributions from entities such as the Extra Help (Low-Income Subsidy) program, State Pharmaceutical Assistance Programs (SPAPs), and AIDS Drug Assistance Programs (ADAPs) count toward TrOOP.

What Does Not Count Toward TrOOP?

Not all drug-related costs contribute to TrOOP. Some expenses that do not count include:

• Monthly Premiums: Medicare Part D premiums are separate from TrOOP calculations.
• Payments Made by the Part D Plan: The portion of drug costs covered by the insurance plan does not apply toward TrOOP.
• Drugs Not Covered by the Plan: Any out-of-pocket expenses for drugs not included in the Part D formulary do not count.
• Payments by Most Third Parties: Costs paid by employer-sponsored retiree plans, drug manufacturer patient assistance programs, and other non-qualifying third-party payers generally do not contribute to TrOOP.
• Over-the-Counter Medications: Non-prescription drugs and supplies are not factored into TrOOP calculations.

Why TrOOP Matters

TrOOP is an essential metric in Medicare Part D because it directly impacts when a beneficiary reaches the catastrophic coverage phase. Once TrOOP spending exceeds the designated annual threshold, the enrollee's cost-sharing drops significantly. In catastrophic coverage, the individual pays only a small percentage of the medication cost or a set copayment, and the federal government and the Medicare Part D plan cover the majority of the expenses. This provides crucial financial relief for those with high prescription drug costs.

Without TrOOP, there would be no clear mechanism for tracking a beneficiary’s progress toward catastrophic coverage. By ensuring that only qualified out-of-pocket costs count toward this threshold, Medicare prevents cost-shifting from insurers or third parties that could artificially inflate spending calculations.

TrOOP and the Medicare Coverage Gap (“Donut Hole”)

Historically, the coverage gap (donut hole) in Medicare Part D left enrollees paying a much higher share of drug costs before they reached catastrophic coverage. While reforms have reduced the burden, TrOOP remains an essential factor in helping beneficiaries progress through the different cost phases.

For brand-name drugs in the coverage gap, beneficiaries receive a discount from drug manufacturers. Even though they pay only a percentage of the drug’s cost, the full value of the manufacturer’s discount counts toward TrOOP. This helps beneficiaries reach the catastrophic phase more quickly.

For generic drugs, however, only the amount actually paid by the enrollee is counted toward TrOOP. This distinction is important because it affects how quickly different types of drug purchases move an enrollee toward catastrophic coverage.

Changes to TrOOP Under Recent Medicare Reforms

Medicare Part D’s cost structure has evolved due to legislative changes aimed at reducing the financial burden on enrollees. The Inflation Reduction Act of 2022 includes provisions that will impact how TrOOP is calculated in future years. Beginning in 2025, a new out-of-pocket spending cap will replace the traditional TrOOP threshold, limiting what enrollees have to pay before entering catastrophic coverage.

Previously, even after reaching catastrophic coverage, beneficiaries had to pay a small percentage of their drug costs. Under the new law, once a beneficiary reaches the annual cap, they will not have to pay anything further for covered prescription drugs for the rest of the year. This reform is expected to provide significant cost relief for those with high medication expenses.

The Bottom Line

True Out-of-Pocket (TrOOP) costs are a critical component of Medicare Part D, determining when a beneficiary qualifies for catastrophic drug coverage. It includes deductibles, copayments, and manufacturer discounts but excludes premiums, plan payments, and non-covered drugs. TrOOP ensures that Medicare enrollees with high prescription drug costs receive financial relief at the right time. With upcoming Medicare reforms set to change how out-of-pocket costs are handled, understanding TrOOP remains essential for those relying on Medicare Part D for their prescription drug coverage.