How important is price variation between health insurers?

Area of Science:

• Health economics
• Healthcare management
• Health services research

Background:

• Negotiated prices between healthcare payers and providers are critical determinants of health insurance contract value.
• Understanding price variation across different payers is essential for analyzing healthcare costs but remains challenging to observe.
• Enrollee cost-sharing and employer costs are directly impacted by these negotiated rates.

Purpose of the Study:

• To measure and characterize the variation in negotiated hospital prices across different payers in Massachusetts.
• To identify factors influencing negotiated prices, including contract structure and market dynamics.
• To model the incentives driving negotiation outcomes between providers and insurers.

Main Methods:

• Empirical analysis of negotiated hospital-payer prices in Massachusetts.
• Quantification of price variation attributable to payers versus hospitals.
• Econometric modeling to assess the impact of contract type and demand responsiveness on prices.

Main Results:

• Significant price variation exists between different payers for the same hospital services, comparable in magnitude to variation between different hospitals.
• Administrative-services-only (ASO) contracts, where insurers do not assume financial risk, are associated with higher negotiated prices.
• Contractual form and the responsiveness of demand to negotiated prices were identified as key determinants of price levels.

Conclusions:

• Price variation among payers is a substantial component of overall negotiated price differences in health insurance.
• Contractual arrangements, particularly those shifting risk away from insurers, can lead to increased healthcare costs.
• Understanding negotiation dynamics is crucial for developing policies aimed at controlling healthcare expenditures.