University Of Alabama Hospital · Referral network
HSA 1011 · 2014 · 1340 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
-1,325,273
Median F
-232,287
Min F
-96,487,892
Max F
389.4
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,768
Edges
34,108
Avg clustering
0.603
Density
0.0218
Forman μ
-85.5
Forman σ
112.8
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
506,510
Avg degree
11.94
Max degree
365
Negative F edges
7,957
Positive F edges
43
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 365 · weight 39,083
365
#2
NPI 1760471437
Degree 140 · weight 15,870
140
#3
NPI 1881638518
Degree 187 · weight 15,274
187
#4
NPI 1780611913
Degree 119 · weight 12,419
119
#5
NPI 1588634679
Degree 165 · weight 10,386
165
#6
NPI 1497744197
Degree 115 · weight 10,115
115
#7
NPI 1740227925
Degree 100 · weight 9,408
100
#8
NPI 1851320626
Degree 154 · weight 8,449
154
Most negative curvature
#1
Forman -96,487,892
1295745149 → 1780611913
Weight 1,811 · Forman -96,487,892
#2
Forman -94,494,713
1295745149 → 1881638518
Weight 1,429 · Forman -94,494,713
#3
Forman -73,613,331
1295745149 → 1518983766
Weight 1,238 · Forman -73,613,331
#4
Forman -69,730,415
1225081656 → 1295745149
Weight 1,106 · Forman -69,730,415
#5
Forman -67,093,357
1295745149 → 1922252691
Weight 1,044 · Forman -67,093,357
#6
Forman -66,078,982
1285660159 → 1295745149
Weight 1,033 · Forman -66,078,982
#7
Forman -64,468,006
1295745149 → 1790705978
Weight 939 · Forman -64,468,006
#8
Forman -57,472,316
1295745149 → 1821201617
Weight 782 · Forman -57,472,316
Strongest referral edges
#1
Weight 1,851
1588634679 → 1851320626
Weight 1,851 · Forman -23,067,441
#2
Weight 1,811
1295745149 → 1780611913
Weight 1,811 · Forman -96,487,892
#3
Weight 1,429
1295745149 → 1881638518
Weight 1,429 · Forman -94,494,713
#4
Weight 1,238
1295745149 → 1518983766
Weight 1,238 · Forman -73,613,331
#5
Weight 1,185
1336196419 → 1588634679
Weight 1,185 · Forman -10,294,213
#6
Weight 1,184
1780611913 → 1881638518
Weight 1,184 · Forman -22,780,943
#7
Weight 1,106
1225081656 → 1295745149
Weight 1,106 · Forman -69,730,415
#8
Weight 1,105
1336196419 → 1851320626
Weight 1,105 · Forman -8,413,348