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Cot   gres&onal Research Service
Informing the legislative debate ince 1914


September 23, 2019


Negotiation of Drug Prices in Medicare Part D


The 116th Congress is considering a number of approaches
to address prescription drug prices and spending, including
proposals to allow the Secretary of Health and Human
Services (the Secretary) to negotiate prices in the Medicare
Part D program. This In Focus provides an overview of
how drug prices are established under Part D and describes
elements of various proposals for Secretarial negotiation.

Overview of Medicare Part D
Congress created a voluntary Medicare outpatient
prescription drug benefit, Part D, in the Medicare
Prescription Drug, Improvement, and Modernization Act of
2003 (MMA;   P.L. 108-173). The program started in 2006,
and about 46 million Medicare beneficiaries are currently
enrolled. In 2019, Part D spending is estimated to reach
approximately $98 billion. Part D is also the primary source
of drug coverage for individuals enrolled in both Medicare
and the state-federal Medicaid program (dual eligibles).
(See CRS Report R40425, Medicare  Primer, and CRS
Report R406 11, Medicare Part D Prescription Drug
Benefit.)

Part D coverage is provided by private health payers (plan
sponsors) that offer drug-only plans (PDP), or by Medicare
Part C (Medicare Advantage) plans with a Part D benefit
(MA-PD).  Congress designed Part D as a market-oriented
program in which sponsors compete for enrollees based on
the scope and price of benefits, such as premiums and cost-
sharing.

Figure I. 2019 Medicare  Part D Standard  Benefit













Source: CRS analysis of CMS, 2019 Part D Payment Policies.
Note: Enrollees also pay monthly premiums for Part D coverage.
Sponsors submit annual bids to offer drug plans. At a
minimum,  Part D plans must offer a standard benefit
defined in law, or alternative coverage at least actuarially
equivalent to a standard benefit. (See Figure 1.) Medicare
pays plan sponsors a monthly per person amount for
standard benefit coverage. Plan sponsors may also receive
additional Medicare payments for low-income enrollees and


cost-based reinsurance payments for those with high drug
spending.

Determination   of Drug  Prices in Medicare  Part D
To bolster market competition and limit the federal role, the
MMA   included a non-interference provision (Social
Security Act (SSA) §1860D-1 1(i)), which states that in
carrying out the requirements of the Part D program, the
Secretary: (1) may not interfere with the negotiations
between drug manufacturers and pharmacies and PDP
sponsors; and (2) may not require a particular formulary or
institute a price structure for the reimbursement of covered
part D drugs.

Although there is no Part D central formulary (i.e., a list of
covered drugs), plans must cover at least two drugs in each
category or class used to treat the same medical condition
and substantially all drugs in six protected classes: immune-
suppressant, anti-depressant, antipsychotic, anticonvulsant,
antiretroviral, and antineoplastic (cancer). HHS has existing
authority to modify these general formulary requirements,
including the six protected classes. Most Part D sponsors
offer alternative plans that include tiered formularies, which
impose different levels of copayments (flat dollar amount)
or co-insurance (percentage of drug price) for generic,
brand-name, and specialty drugs. Part D specialty drugs are
defined as those with a price of at least $670 per month.

Part D sponsors, working with pharmacy benefit managers
(PBMs), negotiate prices with drug manufacturers and
contract with pharmacies to dispense drugs to plan
enrollees. Negotiated price concessions mainly take the
form of rebates (after-sale reductions) from a
manufacturer's list price for brand-name drugs. Plan
sponsors and PBMs can secure rebates by including a
manufacturer's drug on a plan formulary or by putting it on
a low cost-sharing tier. Sponsors and PBMs have the most
leverage to negotiate rebates when there are competing
drugs on the market, and less ability to secure rebates for
sole-source drugs, or those in the protected classes. The
value of a rebate may be tied to the sales volume or market
share of a drug, and may be aggregated and paid to a plan
over time, such as quarterly.

Plan sponsors can pass on rebates and other price
concessions to enrollees in the form of lower drug prices at
the pharmacy, but the vast majority do not. Instead sponsors
generally use rebate revenue to buy down, or reduce,
premiums, thus spreading price concessions across all
enrollees.

Part   D  Drug   Spending and Prices
Actual Part D spending has been below initial estimates by
the Congressional Budget Office (CBO) and the HHS

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