Select Specialty Hospital-Durham · Referral network
HSA 34024 · 2016 · 1088 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
-13,265,784
Median F
-2,173,985
Min F
-572,863,453
Max F
244
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,337
Edges
23,112
Avg clustering
0.706
Density
0.0259
Forman μ
-265.6
Forman σ
305.6
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
568,155
Avg degree
14.71
Max degree
702
Negative F edges
7,974
Positive F edges
26
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 1154404317
Degree 702 · weight 79,164
702
#2
NPI 1568407781
Degree 564 · weight 54,048
564
#3
NPI 1497839302
Degree 376 · weight 47,586
376
#4
NPI 1295819167
Degree 493 · weight 46,183
493
#5
NPI 1104900265
Degree 309 · weight 26,400
309
#6
NPI 1659454890
Degree 334 · weight 24,560
334
#7
NPI 1093775009
Degree 228 · weight 23,333
228
#8
NPI 1295795201
Degree 232 · weight 23,320
232
Most negative curvature
#1
Forman -572,863,453
1154404317 → 1568407781
Weight 2,283 · Forman -572,863,453
#2
Forman -571,116,699
1154404317 → 1497839302
Weight 3,328 · Forman -571,116,699
#3
Forman -488,024,460
1154404317 → 1295819167
Weight 2,007 · Forman -488,024,460
#4
Forman -387,317,158
1104900265 → 1154404317
Weight 1,936 · Forman -387,317,158
#5
Forman -345,829,888
1154404317 → 1790793578
Weight 1,798 · Forman -345,829,888
#6
Forman -334,113,326
1497839302 → 1568407781
Weight 2,415 · Forman -334,113,326
#7
Forman -321,214,080
1295819167 → 1568407781
Weight 1,699 · Forman -321,214,080
#8
Forman -313,311,225
1154404317 → 1659454890
Weight 1,233 · Forman -313,311,225
Strongest referral edges
#1
Weight 3,328
1154404317 → 1497839302
Weight 3,328 · Forman -571,116,699
#2
Weight 2,415
1497839302 → 1568407781
Weight 2,415 · Forman -334,113,326
#3
Weight 2,328
1295819167 → 1497839302
Weight 2,328 · Forman -275,176,084
#4
Weight 2,283
1154404317 → 1568407781
Weight 2,283 · Forman -572,863,453
#5
Weight 2,007
1154404317 → 1295819167
Weight 2,007 · Forman -488,024,460
#6
Weight 1,936
1104900265 → 1154404317
Weight 1,936 · Forman -387,317,158
#7
Weight 1,798
1154404317 → 1790793578
Weight 1,798 · Forman -345,829,888
#8
Weight 1,699
1295819167 → 1568407781
Weight 1,699 · Forman -321,214,080