St. Francis Hospital-Memphis · Referral network
HSA 44059 · 2014 · 1201 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
-2,813,945
Median F
-643,333
Min F
-79,614,830
Max F
201
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,824
Edges
56,386
Avg clustering
0.637
Density
0.0339
Forman μ
-178.8
Forman σ
197.3
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
563,957
Avg degree
13.32
Max degree
374
Negative F edges
7,965
Positive F edges
35
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 1639261001
Degree 332 · weight 38,351
332
#2
NPI 1073505228
Degree 374 · weight 32,912
374
#3
NPI 1710163050
Degree 212 · weight 24,386
212
#4
NPI 1346249661
Degree 244 · weight 20,269
244
#5
NPI 1710915061
Degree 147 · weight 20,051
147
#6
NPI 1801830849
Degree 207 · weight 19,779
207
#7
NPI 1447331152
Degree 167 · weight 19,308
167
#8
NPI 1356318059
Degree 214 · weight 18,030
214
Most negative curvature
#1
Forman -79,614,830
1073505228 → 1861417164
Weight 1,670 · Forman -79,614,830
#2
Forman -73,844,982
1407805567 → 1639261001
Weight 1,569 · Forman -73,844,982
#3
Forman -67,921,868
1154356764 → 1639261001
Weight 1,341 · Forman -67,921,868
#4
Forman -62,786,200
1073505228 → 1710915061
Weight 773 · Forman -62,786,200
#5
Forman -58,555,851
1639261001 → 1699088559
Weight 1,220 · Forman -58,555,851
#6
Forman -54,896,551
1073505228 → 1831190834
Weight 819 · Forman -54,896,551
#7
Forman -52,075,569
1639261001 → 1750608287
Weight 966 · Forman -52,075,569
#8
Forman -45,634,836
1073505228 → 1689675399
Weight 600 · Forman -45,634,836
Strongest referral edges
#1
Weight 1,670
1073505228 → 1861417164
Weight 1,670 · Forman -79,614,830
#2
Weight 1,569
1407805567 → 1639261001
Weight 1,569 · Forman -73,844,982
#3
Weight 1,478
1225065048 → 1710915061
Weight 1,478 · Forman -16,158,834
#4
Weight 1,440
1083882591 → 1801896881
Weight 1,440 · Forman -12,244,245
#5
Weight 1,414
1447331152 → 1962507061
Weight 1,414 · Forman -18,410,802
#6
Weight 1,341
1154356764 → 1639261001
Weight 1,341 · Forman -67,921,868
#7
Weight 1,231
1306944913 → 1710915061
Weight 1,231 · Forman -14,034,581
#8
Weight 1,220
1639261001 → 1699088559
Weight 1,220 · Forman -58,555,851