St. Francis Hospital-Memphis · Referral network
HSA 44059 · 2017 · 1329 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
-3,896,667
Median F
-664,895
Min F
-184,536,004
Max F
305.5
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
2,133
Edges
65,006
Avg clustering
0.621
Density
0.0286
Forman μ
-190.8
Forman σ
240.3
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
527,447
Avg degree
12.04
Max degree
532
Negative F edges
7,962
Positive F edges
38
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 532 · weight 51,027
532
#2
NPI 1639261001
Degree 368 · weight 35,604
368
#3
NPI 1710915061
Degree 155 · weight 20,059
155
#4
NPI 1154356764
Degree 105 · weight 16,633
105
#5
NPI 1710163050
Degree 152 · weight 16,213
152
#6
NPI 1619919305
Degree 144 · weight 16,210
144
#7
NPI 1447331152
Degree 133 · weight 15,688
133
#8
NPI 1407805567
Degree 91 · weight 13,900
91
Most negative curvature
#1
Forman -184,536,004
1073505228 → 1861417164
Weight 1,950 · Forman -184,536,004
#2
Forman -152,083,835
1073505228 → 1710915061
Weight 1,143 · Forman -152,083,835
#3
Forman -121,374,603
1073505228 → 1831190834
Weight 835 · Forman -121,374,603
#4
Forman -117,709,138
1073505228 → 1235130097
Weight 825 · Forman -117,709,138
#5
Forman -111,109,088
1073505228 → 1205031390
Weight 735 · Forman -111,109,088
#6
Forman -109,638,557
1073505228 → 1972595189
Weight 716 · Forman -109,638,557
#7
Forman -109,169,901
1073505228 → 1598733545
Weight 706 · Forman -109,169,901
#8
Forman -108,790,672
1073505228 → 1801813985
Weight 705 · Forman -108,790,672
Strongest referral edges
#1
Weight 1,950
1073505228 → 1861417164
Weight 1,950 · Forman -184,536,004
#2
Weight 1,397
1154356764 → 1639261001
Weight 1,397 · Forman -74,265,595
#3
Weight 1,386
1225065048 → 1710915061
Weight 1,386 · Forman -15,506,602
#4
Weight 1,334
1780690230 → 1851482921
Weight 1,334 · Forman -286,198
#5
Weight 1,289
1407805567 → 1639261001
Weight 1,289 · Forman -69,248,825
#6
Weight 1,143
1073505228 → 1710915061
Weight 1,143 · Forman -152,083,835
#7
Weight 1,093
1447331152 → 1962507061
Weight 1,093 · Forman -10,113,147
#8
Weight 1,058
1083882591 → 1801896881
Weight 1,058 · Forman -3,587,420