Medicare Part B Intensity and Volume Offset.

Area of Science:

• Health economics
• Healthcare policy
• Medical practice management

Background:

• Medicare Part B fee schedule adjustments assume 'volume offsetting' where providers increase services to compensate for fee reductions.
• Recent studies question the extent and existence of traditional volume offsetting.
• This research introduces and tests 'intensity offsetting' as an alternative provider response to fee changes.

Purpose of the Study:

• To empirically evaluate the hypotheses of volume offsetting and intensity offsetting under Medicare Part B.
• To quantify the extent to which providers engage in intensity offsetting in response to fee schedule reductions.
• To compare the impact of intensity offsetting versus volume offsetting on overall revenue.

Main Methods:

• The study analyzed claims data to assess changes in service provision and intensity following Medicare fee schedule adjustments.
• It developed and applied statistical models to differentiate between volume offsetting and intensity offsetting.
• A simulation was conducted to estimate the effects of a hypothetical 10% Medicare fee reduction.

Main Results:

• Strong empirical evidence supports the existence of intensity offsetting.
• Little to no evidence was found to support significant volume offsetting in recent practice.
• Simulated 10% Medicare fee reductions are estimated to be offset by 22% to 59% through alterations in service intensity.

Conclusions:

• Intensity offsetting, rather than volume offsetting, appears to be the primary mechanism providers use to respond to Medicare fee reductions.
• Healthcare policy adjustments should consider the implications of intensity offsetting for service value and patient care.
• The findings suggest that Medicare fee schedule changes have a substantial impact on service delivery intensity.