University Of Louisville Hosp · Referral network
HSA 18049 · 2014 · 1158 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
-2,959,287
Median F
-1,748,629
Min F
-49,507,061
Max F
209
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
2,260
Edges
78,199
Avg clustering
0.640
Density
0.0306
Forman μ
-218.6
Forman σ
217.8
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
530,237
Avg degree
13.82
Max degree
401
Negative F edges
7,983
Positive F edges
17
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 1720070196
Degree 401 · weight 34,651
401
#2
NPI 1285745612
Degree 135 · weight 19,616
135
#3
NPI 1891746483
Degree 194 · weight 18,578
194
#4
NPI 1770534034
Degree 179 · weight 18,015
179
#5
NPI 1780672402
Degree 201 · weight 17,654
201
#6
NPI 1891749305
Degree 283 · weight 16,950
283
#7
NPI 1982689618
Degree 193 · weight 16,564
193
#8
NPI 1063400885
Degree 177 · weight 16,241
177
Most negative curvature
#1
Forman -49,507,061
1720070196 → 1720277684
Weight 629 · Forman -49,507,061
#2
Forman -45,449,772
1639177884 → 1720070196
Weight 528 · Forman -45,449,772
#3
Forman -45,360,665
1356385413 → 1720070196
Weight 464 · Forman -45,360,665
#4
Forman -41,860,326
1720070196 → 1780672402
Weight 277 · Forman -41,860,326
#5
Forman -41,258,817
1063400885 → 1720070196
Weight 299 · Forman -41,258,817
#6
Forman -40,820,960
1720070196 → 1730379058
Weight 428 · Forman -40,820,960
#7
Forman -40,014,895
1720070196 → 1821210584
Weight 411 · Forman -40,014,895
#8
Forman -39,048,519
1720070196 → 1982689618
Weight 252 · Forman -39,048,519
Strongest referral edges
#1
Weight 2,158
1003871518 → 1285745612
Weight 2,158 · Forman -25,752,426
#2
Weight 1,317
1770534034 → 1992758197
Weight 1,317 · Forman -21,342,806
#3
Weight 1,215
1891746483 → 1902846157
Weight 1,215 · Forman -20,087,560
#4
Weight 1,179
1538171517 → 1891746483
Weight 1,179 · Forman -18,741,228
#5
Weight 1,137
1538171517 → 1770534034
Weight 1,137 · Forman -16,778,350
#6
Weight 1,045
1679742290 → 1861495046
Weight 1,045 · Forman -1,491,288
#7
Weight 1,028
1598910762 → 1891749305
Weight 1,028 · Forman -25,529,467
#8
Weight 1,024
1063400885 → 1912995721
Weight 1,024 · Forman -28,695,901