University Of Alabama Hospital · Referral network
HSA 1011 · 2016 · 1413 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
-1,370,883
Median F
-241,290
Min F
-90,208,009
Max F
956
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,995
Edges
39,325
Avg clustering
0.590
Density
0.0198
Forman μ
-94.6
Forman σ
113.6
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
506,083
Avg degree
11.32
Max degree
372
Negative F edges
7,956
Positive F edges
44
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 372 · weight 36,706
372
#2
NPI 1881638518
Degree 232 · weight 16,395
232
#3
NPI 1760471437
Degree 157 · weight 15,518
157
#4
NPI 1497744197
Degree 142 · weight 14,507
142
#5
NPI 1386633857
Degree 83 · weight 11,780
83
#6
NPI 1740227925
Degree 117 · weight 11,307
117
#7
NPI 1740236694
Degree 108 · weight 10,598
108
#8
NPI 1942423108
Degree 138 · weight 8,877
138
Most negative curvature
#1
Forman -90,208,009
1295745149 → 1881638518
Weight 1,208 · Forman -90,208,009
#2
Forman -70,146,454
1295745149 → 1780611913
Weight 1,127 · Forman -70,146,454
#3
Forman -68,628,910
1295745149 → 1922252691
Weight 1,132 · Forman -68,628,910
#4
Forman -65,901,673
1285660159 → 1295745149
Weight 1,080 · Forman -65,901,673
#5
Forman -63,980,013
1295745149 → 1518983766
Weight 998 · Forman -63,980,013
#6
Forman -61,667,712
1003030693 → 1295745149
Weight 941 · Forman -61,667,712
#7
Forman -60,712,107
1295745149 → 1790705978
Weight 875 · Forman -60,712,107
#8
Forman -57,624,104
1295745149 → 1821201617
Weight 826 · Forman -57,624,104
Strongest referral edges
#1
Weight 1,366
1588634679 → 1851320626
Weight 1,366 · Forman -9,661,723
#2
Weight 1,208
1295745149 → 1881638518
Weight 1,208 · Forman -90,208,009
#3
Weight 1,132
1295745149 → 1922252691
Weight 1,132 · Forman -68,628,910
#4
Weight 1,127
1295745149 → 1780611913
Weight 1,127 · Forman -70,146,454
#5
Weight 1,080
1285660159 → 1295745149
Weight 1,080 · Forman -65,901,673
#6
Weight 998
1295745149 → 1518983766
Weight 998 · Forman -63,980,013
#7
Weight 941
1003030693 → 1295745149
Weight 941 · Forman -61,667,712
#8
Weight 923
1134339799 → 1558551127
Weight 923 · Forman -303,099