Geographic Variations in Physician Relationships Over Time: Implications for Care Coordination

Area of Science:

• Health Services Research
• Medical Informatics
• Physician Network Analysis

Background:

• Care coordination is crucial for effective healthcare delivery.
• Challenges arise when primary care physicians' (PCPs) collaborative networks are unstable over time.
• Understanding physician patient-sharing dynamics is key to assessing care coordination.

Purpose of the Study:

• To investigate the persistence of patient-sharing relationships between PCPs and other physicians over time.
• To analyze the impact of these relationships on healthcare utilization, specifically emergency room (ER) visits.

Main Methods:

• Utilized Medicare data to map physician patient-sharing networks.
• Employed the Dartmouth Atlas for regional health system analysis.
• Analyzed the temporal stability of PCP-physician connections from 2012 to 2013.

Main Results:

• 70.7% of physician ties present in 2012 persisted into 2013.
• Increased shared patients in 2012 positively correlated with network persistence in 2013.
• Regions with higher persistent ties showed lower ER visit rates.
• Regions with more numerous PCP physician connections exhibited higher ER visit rates.

Conclusions:

• Physician networks demonstrate significant year-to-year stability.
• Network persistence may be linked to reduced emergency room utilization.
• The density of physician connections presents a complex relationship with emergency room visits, highlighting potential challenges for healthcare reforms aiming to improve care coordination.