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Primary care physicians (PCPs) referring patients to fewer specialists builds stronger PCP-specialist teams. This focused referral strategy improves healthcare team performance and reduces patient healthcare utilization without compromising quality.

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Area of Science:

  • Health Services Research
  • Clinical Team Dynamics
  • Healthcare Management

Background:

  • Primary care physicians (PCPs) coordinate patient care by referring them to specialists.
  • The structure of these referral networks can influence the efficiency and effectiveness of care delivery.
  • Understanding how PCP referral patterns impact specialist collaboration is crucial for optimizing healthcare systems.

Purpose of the Study:

  • To investigate the relationship between PCP referral concentration and healthcare utilization.
  • To determine if focused PCP referrals to specialists enhance team performance.
  • To assess the impact of PCP referral patterns on patient health outcomes.

Main Methods:

  • Developed a novel measure of PCP team referral concentration using claims data.
  • Analyzed data from the Massachusetts All Payer Claims Database and a national Medicare claims sample.
  • Employed various identification strategies to control for patient and physician characteristics.

Main Results:

  • PCP team referral concentration varies significantly across physicians.
  • Patients treated by PCPs with higher referral concentration experienced 4% lower healthcare utilization.
  • No discernible reduction in quality of care was observed with increased referral concentration.

Conclusions:

  • Concentrating specialist referrals fosters repeated interactions between PCPs and specialists.
  • Repeated interactions incentivize the development of productive team relationships.
  • Improved PCP-specialist team performance, driven by referral concentration, leads to reduced healthcare utilization.