H3: A Healthcare Three-Hop Index for Physician Referral Network Prediction

ArXi:2605.02150v1 Announce Type: cross Accurate prediction of physician referral links is essential for optimizing care coordination and reducing fragmentation in healthcare delivery. However, existing computational methods, ranging from triadic closure heuristics to graph neural networks, fail to capture the intrinsic properties of physician referral networks, including sparsity, disassortative degree mixing, and hub-dominated topology.