Zuckerberg San Francisco Generl Hos · Referral network
HSA 5208 · 2014 · 1303 physicians · 5867 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
-2,397,684
Median F
-108,770
Min F
-126,411,865
Max F
334
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,730
Edges
15,651
Avg clustering
0.543
Density
0.0105
Forman μ
-85.2
Forman σ
155.5
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
304,269
Avg degree
9.01
Max degree
454
Negative F edges
5,801
Positive F edges
66
Nonzero F edges
5,867
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 454 · weight 46,231
454
#2
NPI 1215970538
Degree 238 · weight 15,082
238
#3
NPI 1700835584
Degree 171 · weight 12,281
171
#4
NPI 1568473361
Degree 115 · weight 6,295
115
#5
NPI 1497774798
Degree 91 · weight 5,966
91
#6
NPI 1265443352
Degree 116 · weight 5,943
116
#7
NPI 1932110012
Degree 94 · weight 5,552
94
#8
NPI 1508940305
Degree 91 · weight 5,244
91
Most negative curvature
#1
Forman -126,411,865
1215994827 → 1700835584
Weight 1,491 · Forman -126,411,865
#2
Forman -97,625,051
1215994827 → 1497774798
Weight 1,039 · Forman -97,625,051
#3
Forman -89,520,055
1215994827 → 1760431837
Weight 896 · Forman -89,520,055
#4
Forman -86,973,697
1215994827 → 1558577106
Weight 851 · Forman -86,973,697
#5
Forman -84,015,085
1215994827 → 1609809649
Weight 803 · Forman -84,015,085
#6
Forman -83,300,795
1215994827 → 1275585788
Weight 790 · Forman -83,300,795
#7
Forman -80,195,309
1154379584 → 1215994827
Weight 729 · Forman -80,195,309
#8
Forman -77,710,875
1215994827 → 1619928892
Weight 693 · Forman -77,710,875
Strongest referral edges
#1
Weight 1,491
1215994827 → 1700835584
Weight 1,491 · Forman -126,411,865
#2
Weight 1,039
1215994827 → 1497774798
Weight 1,039 · Forman -97,625,051
#3
Weight 896
1215994827 → 1760431837
Weight 896 · Forman -89,520,055
#4
Weight 851
1215994827 → 1558577106
Weight 851 · Forman -86,973,697
#5
Weight 803
1215994827 → 1609809649
Weight 803 · Forman -84,015,085
#6
Weight 790
1215994827 → 1275585788
Weight 790 · Forman -83,300,795
#7
Weight 729
1154379584 → 1215994827
Weight 729 · Forman -80,195,309
#8
Weight 725
1124062013 → 1215970538
Weight 725 · Forman -15,655,400