Select Specialty Hospital-Durham · Referral network
HSA 34024 · 2014 · 1052 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
-11,021,570
Median F
-2,108,198
Min F
-428,519,275
Max F
408
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,299
Edges
24,346
Avg clustering
0.705
Density
0.0289
Forman μ
-253.8
Forman σ
298.8
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
574,030
Avg degree
15.21
Max degree
563
Negative F edges
7,975
Positive F edges
25
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 551 · weight 62,960
551
#2
NPI 1659454890
Degree 563 · weight 57,750
563
#3
NPI 1295819167
Degree 480 · weight 46,852
480
#4
NPI 1497839302
Degree 347 · weight 40,206
347
#5
NPI 1568407781
Degree 461 · weight 40,136
461
#6
NPI 1275594772
Degree 273 · weight 27,617
273
#7
NPI 1093775009
Degree 247 · weight 26,325
247
#8
NPI 1790793578
Degree 240 · weight 25,895
240
Most negative curvature
#1
Forman -428,519,275
1154404317 → 1659454890
Weight 2,149 · Forman -428,519,275
#2
Forman -342,010,052
1154404317 → 1295819167
Weight 1,877 · Forman -342,010,052
#3
Forman -324,517,399
1295819167 → 1659454890
Weight 1,725 · Forman -324,517,399
#4
Forman -319,411,176
1497839302 → 1659454890
Weight 2,459 · Forman -319,411,176
#5
Forman -301,161,457
1154404317 → 1568407781
Weight 1,619 · Forman -301,161,457
#6
Forman -286,183,159
1568407781 → 1659454890
Weight 1,494 · Forman -286,183,159
#7
Forman -252,585,953
1154404317 → 1790793578
Weight 2,097 · Forman -252,585,953
#8
Forman -247,202,799
1295819167 → 1497839302
Weight 2,357 · Forman -247,202,799
Strongest referral edges
#1
Weight 2,459
1497839302 → 1659454890
Weight 2,459 · Forman -319,411,176
#2
Weight 2,357
1295819167 → 1497839302
Weight 2,357 · Forman -247,202,799
#3
Weight 2,149
1154404317 → 1659454890
Weight 2,149 · Forman -428,519,275
#4
Weight 2,097
1154404317 → 1790793578
Weight 2,097 · Forman -252,585,953
#5
Weight 1,877
1154404317 → 1295819167
Weight 1,877 · Forman -342,010,052
#6
Weight 1,752
1497839302 → 1568407781
Weight 1,752 · Forman -195,981,595
#7
Weight 1,725
1295819167 → 1659454890
Weight 1,725 · Forman -324,517,399
#8
Weight 1,709
1104900265 → 1154404317
Weight 1,709 · Forman -218,453,110