Does payment drive procedures? Payment for specialty services and procedure rate variations in 3 HMOs

Area of Science:

• Health Services Research
• Medical Economics
• Healthcare Policy

Background:

• Physician payment models significantly influence healthcare delivery.
• Understanding the relationship between payment structures and procedural rates is crucial for cost and quality control.

Purpose of the Study:

• To investigate the impact of different payment methods on the performance of invasive procedures across various medical specialties.
• To analyze variations in procedure rates associated with fee-for-service, capitation, and salary payment models.

Main Methods:

• Observational study utilizing administrative data from three large health maintenance organizations (HMOs).
• Analysis of procedure rates for cardiology, gastroenterology, ophthalmology, orthopedic, and ENT services between 1996-1998.
• Age-, sex-, and comorbidity-adjusted comparison of procedure probabilities based on payment method within each HMO.

Main Results:

• Fee-for-service payment was associated with higher invasive procedure rates compared to capitation or salary.
• No consistent pattern was observed between salary and capitation payment methods.
• Procedure rate variations existed even within the same specialty and plan, depending on the specific procedure.

Conclusions:

• Payment methods for specialty services demonstrated a variable association with the likelihood of patients undergoing invasive procedures.
• Further research is needed to fully understand the effects of payment models on healthcare costs, quality, and outcomes.
• Health plan data systems present challenges for conducting such in-depth studies.