University Of Alabama Hospital · Referral network
HSA 1011 · 2015 · 1376 physicians · 8000 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
-1,305,937
Median F
-221,765
Min F
-101,981,278
Max F
888
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,844
Edges
34,154
Avg clustering
0.601
Density
0.0201
Forman μ
-89.9
Forman σ
118.6
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
494,709
Avg degree
11.63
Max degree
376
Negative F edges
7,967
Positive F edges
33
Nonzero F edges
8,000
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 1295745149
Degree 376 · weight 38,910
376
#2
NPI 1760471437
Degree 164 · weight 16,518
164
#3
NPI 1881638518
Degree 183 · weight 13,527
183
#4
NPI 1780611913
Degree 138 · weight 12,740
138
#5
NPI 1386633857
Degree 77 · weight 9,858
77
#6
NPI 1740227925
Degree 100 · weight 8,027
100
#7
NPI 1497744197
Degree 106 · weight 7,630
106
#8
NPI 1790705978
Degree 52 · weight 7,327
52
Most negative curvature
#1
Forman -101,981,278
1295745149 → 1780611913
Weight 1,815 · Forman -101,981,278
#2
Forman -91,941,305
1295745149 → 1881638518
Weight 1,317 · Forman -91,941,305
#3
Forman -76,015,278
1285660159 → 1295745149
Weight 1,268 · Forman -76,015,278
#4
Forman -75,028,349
1295745149 → 1518983766
Weight 1,185 · Forman -75,028,349
#5
Forman -74,966,247
1295745149 → 1922252691
Weight 1,183 · Forman -74,966,247
#6
Forman -66,951,693
1295745149 → 1790705978
Weight 940 · Forman -66,951,693
#7
Forman -65,576,909
1225081656 → 1295745149
Weight 916 · Forman -65,576,909
#8
Forman -63,785,825
1295745149 → 1821201617
Weight 895 · Forman -63,785,825
Strongest referral edges
#1
Weight 1,815
1295745149 → 1780611913
Weight 1,815 · Forman -101,981,278
#2
Weight 1,427
1588634679 → 1851320626
Weight 1,427 · Forman -10,864,782
#3
Weight 1,317
1295745149 → 1881638518
Weight 1,317 · Forman -91,941,305
#4
Weight 1,268
1285660159 → 1295745149
Weight 1,268 · Forman -76,015,278
#5
Weight 1,185
1295745149 → 1518983766
Weight 1,185 · Forman -75,028,349
#6
Weight 1,183
1295745149 → 1922252691
Weight 1,183 · Forman -74,966,247
#7
Weight 1,021
1780611913 → 1881638518
Weight 1,021 · Forman -21,401,906
#8
Weight 969
1134159668 → 1942415153
Weight 969 · Forman -757,614