Zuckerberg San Francisco Generl Hos · Referral network
HSA 5208 · 2017 · 1248 physicians · 5008 edges
Running from SQLite — no Neo4j required. Regional and HSA dashboards, this force graph, curvature histogram, and hub rankings all work out of the box. Advanced users can optionally load the graph into a self-hosted Neo4j instance (docker compose up -d, then npm run etl-to-neo4j) for the Cypher playground and Neo4j Browser.
Force-directed graph · edges coloured by Forman–Ricci curvature
Loading graph engine…
Curvature distribution
Mean F
-3,249,914
Median F
-78,426
Min F
-151,037,409
Max F
574
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,729
Edges
14,271
Avg clustering
0.542
Density
0.0096
Forman μ
-95.4
Forman σ
188
Rendered graph structure
Live computation on up to 8,000 edges (SQLite row order, node-strength weights). Values will differ from precomputed stats above for large HSAs.
Total weight
256,354
Avg degree
8.03
Max degree
500
Negative F edges
4,929
Positive F edges
79
Nonzero F edges
5,008
Reading the graph
Teal edges have positive Forman curvature — efficient information flow.
Red edges have negative curvature — bottlenecks in the referral graph.
Edge width: log(patient count). Node size: degree-weighted strength.
Hub physicians
#1
NPI 1215994827
Degree 500 · weight 48,507
500
#2
NPI 1922274570
Degree 145 · weight 10,175
145
#3
NPI 1568473361
Degree 151 · weight 9,150
151
#4
NPI 1528196185
Degree 146 · weight 8,610
146
#5
NPI 1932110012
Degree 113 · weight 6,774
113
#6
NPI 1114152717
Degree 98 · weight 5,847
98
#7
NPI 1265443352
Degree 108 · weight 5,421
108
#8
NPI 1093726879
Degree 88 · weight 5,163
88
Most negative curvature
#1
Forman -151,037,409
1215994827 → 1922274570
Weight 1,647 · Forman -151,037,409
#2
Forman -116,442,336
1215994827 → 1700835584
Weight 1,073 · Forman -116,442,336
#3
Forman -110,343,392
1215994827 → 1760440465
Weight 962 · Forman -110,343,392
#4
Forman -97,867,279
1215994827 → 1609809649
Weight 779 · Forman -97,867,279
#5
Forman -93,600,494
1215994827 → 1275585788
Weight 716 · Forman -93,600,494
#6
Forman -89,721,624
1174850911 → 1215994827
Weight 658 · Forman -89,721,624
#7
Forman -87,361,982
1215994827 → 1548459282
Weight 623 · Forman -87,361,982
#8
Forman -84,278,792
1215994827 → 1588628598
Weight 582 · Forman -84,278,792
Strongest referral edges
#1
Weight 1,647
1215994827 → 1922274570
Weight 1,647 · Forman -151,037,409
#2
Weight 1,073
1215994827 → 1700835584
Weight 1,073 · Forman -116,442,336
#3
Weight 962
1215994827 → 1760440465
Weight 962 · Forman -110,343,392
#4
Weight 779
1215994827 → 1609809649
Weight 779 · Forman -97,867,279
#5
Weight 716
1215994827 → 1275585788
Weight 716 · Forman -93,600,494
#6
Weight 658
1174850911 → 1215994827
Weight 658 · Forman -89,721,624
#7
Weight 623
1215994827 → 1548459282
Weight 623 · Forman -87,361,982
#8
Weight 582
1215994827 → 1588628598
Weight 582 · Forman -84,278,792