Does open enrollment control premiums? A case study from the "Medigap" market

Area of Science:

• Health policy
• Insurance regulation

Background:

• In 1999, Missouri revised its Medigap regulations.
• The change permitted Medicare beneficiaries to switch Medigap carriers annually without losing open enrollment.
• This policy aimed to increase consumer choice and competition within the Medigap market.

Purpose of the Study:

• To analyze the impact of Missouri's 1999 Medigap regulatory change.
• To assess the effects on insurance premiums and consumer choice.
• To provide insights for other states considering similar policy modifications.

Main Methods:

• Comparative analysis of insurance outcomes in Missouri versus Kansas and Florida.
• Examination of Medigap policy premiums and availability before and after the regulatory change.
• Statistical comparison of key performance indicators between the states.

Main Results:

• Little evidence suggests the policy change significantly impacted Medigap premiums in Missouri.
• The regulatory change did not appear to negatively affect the availability of Medigap coverage.
• The policy facilitated greater flexibility for Medicare beneficiaries in selecting Medigap plans.

Conclusions:

• The Missouri Medigap policy change offers potential benefits for consumers without adverse premium effects.
• The regulatory flexibility introduced may be attractive for other states to adopt.
• Further research could explore long-term impacts on market competition and beneficiary satisfaction.