Zuckerberg San Francisco Generl Hos · Referral network
HSA 5208 · 2016 · 1191 physicians · 5309 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
-3,215,639
Median F
-79,686
Min F
-159,047,648
Max F
674
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,687
Edges
14,850
Avg clustering
0.548
Density
0.0104
Forman μ
-88.3
Forman σ
175.9
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
271,412
Avg degree
8.92
Max degree
498
Negative F edges
5,242
Positive F edges
67
Nonzero F edges
5,309
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 498 · weight 52,212
498
#2
NPI 1922274570
Degree 134 · weight 10,106
134
#3
NPI 1700835584
Degree 109 · weight 7,173
109
#4
NPI 1568473361
Degree 120 · weight 6,258
120
#5
NPI 1932110012
Degree 99 · weight 5,598
99
#6
NPI 1114152717
Degree 84 · weight 5,272
84
#7
NPI 1528196185
Degree 86 · weight 4,661
86
#8
NPI 1881761948
Degree 89 · weight 4,523
89
Most negative curvature
#1
Forman -159,047,648
1215994827 → 1922274570
Weight 1,713 · Forman -159,047,648
#2
Forman -140,125,470
1215994827 → 1700835584
Weight 1,388 · Forman -140,125,470
#3
Forman -116,696,604
1215994827 → 1275585788
Weight 1,015 · Forman -116,696,604
#4
Forman -110,502,507
1215994827 → 1760440465
Weight 902 · Forman -110,502,507
#5
Forman -110,284,782
1215994827 → 1609809649
Weight 913 · Forman -110,284,782
#6
Forman -102,660,012
1215994827 → 1316987472
Weight 791 · Forman -102,660,012
#7
Forman -100,155,795
1215994827 → 1497774798
Weight 758 · Forman -100,155,795
#8
Forman -90,815,613
1215994827 → 1376554030
Weight 622 · Forman -90,815,613
Strongest referral edges
#1
Weight 1,713
1215994827 → 1922274570
Weight 1,713 · Forman -159,047,648
#2
Weight 1,388
1215994827 → 1700835584
Weight 1,388 · Forman -140,125,470
#3
Weight 1,015
1215994827 → 1275585788
Weight 1,015 · Forman -116,696,604
#4
Weight 913
1215994827 → 1609809649
Weight 913 · Forman -110,284,782
#5
Weight 902
1215994827 → 1760440465
Weight 902 · Forman -110,502,507
#6
Weight 791
1215994827 → 1316987472
Weight 791 · Forman -102,660,012
#7
Weight 758
1215994827 → 1497774798
Weight 758 · Forman -100,155,795
#8
Weight 622
1215994827 → 1376554030
Weight 622 · Forman -90,815,613