St. Francis Hospital-Memphis · Referral network
HSA 44059 · 2016 · 1266 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
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Curvature distribution
Mean F
-3,669,008
Median F
-686,634
Min F
-142,985,715
Max F
584
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
2,022
Edges
64,421
Avg clustering
0.638
Density
0.0315
Forman μ
-187.1
Forman σ
221.9
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
543,742
Avg degree
12.64
Max degree
494
Negative F edges
7,969
Positive F edges
31
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 1073505228
Degree 494 · weight 48,006
494
#2
NPI 1639261001
Degree 353 · weight 35,748
353
#3
NPI 1346249661
Degree 271 · weight 22,535
271
#4
NPI 1710163050
Degree 207 · weight 20,949
207
#5
NPI 1710915061
Degree 135 · weight 18,201
135
#6
NPI 1447331152
Degree 124 · weight 16,053
124
#7
NPI 1619919305
Degree 128 · weight 15,578
128
#8
NPI 1154356764
Degree 95 · weight 14,697
95
Most negative curvature
#1
Forman -142,985,715
1073505228 → 1861417164
Weight 1,637 · Forman -142,985,715
#2
Forman -125,858,975
1073505228 → 1710915061
Weight 1,111 · Forman -125,858,975
#3
Forman -107,159,948
1073505228 → 1831190834
Weight 897 · Forman -107,159,948
#4
Forman -105,887,572
1073505228 → 1821098690
Weight 802 · Forman -105,887,572
#5
Forman -96,203,460
1073505228 → 1700886926
Weight 767 · Forman -96,203,460
#6
Forman -95,413,295
1073505228 → 1396746269
Weight 754 · Forman -95,413,295
#7
Forman -94,372,767
1073505228 → 1801813985
Weight 738 · Forman -94,372,767
#8
Forman -93,363,438
1073505228 → 1205031390
Weight 722 · Forman -93,363,438
Strongest referral edges
#1
Weight 1,666
1083882591 → 1801896881
Weight 1,666 · Forman -18,482,373
#2
Weight 1,637
1073505228 → 1861417164
Weight 1,637 · Forman -142,985,715
#3
Weight 1,426
1639261001 → 1699088559
Weight 1,426 · Forman -63,957,061
#4
Weight 1,401
1225065048 → 1710915061
Weight 1,401 · Forman -11,910,124
#5
Weight 1,327
1407805567 → 1639261001
Weight 1,327 · Forman -67,323,629
#6
Weight 1,291
1154356764 → 1639261001
Weight 1,291 · Forman -67,110,968
#7
Weight 1,111
1225138423 → 1821094418
Weight 1,111 · Forman -185,219
#8
Weight 1,111
1073505228 → 1710915061
Weight 1,111 · Forman -125,858,975