Redesigning Medicare inpatient PPS to adjust payment for post-admission complications

Area of Science:

• Health Economics
• Healthcare Policy
• Medical Informatics

Background:

• The Medicare Diagnosis-Related Group (DRG)-based Inpatient Prospective Payment System (IPPS) incentivizes increased hospital payments for post-admission complications.
• This system design may inadvertently encourage or fail to penalize the occurrence of complications that increase costs.

Purpose of the Study:

• To propose and evaluate a redesigned IPPS that mitigates, but does not eliminate, increased Medicare payments attributed to post-admission complications.
• To quantify the financial impact of such a redesign on Medicare spending.

Main Methods:

• Utilized California healthcare data with specific indicators for diagnoses present at admission.
• Applied a conservative methodology to identify potentially preventable post-admission complications.
• Assessed the impact of these complications on DRG assignments under the current and redesigned IPPS.

Main Results:

• Post-admission complications significantly influence DRG assignments and associated Medicare payments under the current IPPS.
• The proposed redesigned IPPS effectively reduces the financial incentives linked to post-admission complications.
• The redesigned system is projected to decrease Medicare payments related to post-admission complications by over $1 billion annually.

Conclusions:

• A revised IPPS can substantially reduce Medicare expenditures by addressing the financial implications of post-admission complications.
• The findings support policy changes to the IPPS to improve efficiency and patient care outcomes.
• Accurate identification of diagnoses present at admission is crucial for effective payment reform.