Select Specialty Hospital-Durham · Referral network
HSA 34024 · 2017 · 1073 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
-13,976,821
Median F
-1,963,458
Min F
-610,959,846
Max F
252
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,352
Edges
23,263
Avg clustering
0.691
Density
0.0255
Forman μ
-259
Forman σ
304.1
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
587,600
Avg degree
14.91
Max degree
634
Negative F edges
7,972
Positive F edges
28
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 630 · weight 70,941
630
#2
NPI 1568407781
Degree 634 · weight 70,921
634
#3
NPI 1497839302
Degree 392 · weight 50,767
392
#4
NPI 1295819167
Degree 468 · weight 45,483
468
#5
NPI 1104900265
Degree 439 · weight 41,027
439
#6
NPI 1295795201
Degree 242 · weight 25,527
242
#7
NPI 1780768689
Degree 229 · weight 22,920
229
#8
NPI 1093775009
Degree 224 · weight 22,074
224
Most negative curvature
#1
Forman -610,959,846
1154404317 → 1568407781
Weight 2,472 · Forman -610,959,846
#2
Forman -496,519,365
1497839302 → 1568407781
Weight 3,146 · Forman -496,519,365
#3
Forman -479,486,923
1154404317 → 1497839302
Weight 3,015 · Forman -479,486,923
#4
Forman -425,295,840
1295819167 → 1568407781
Weight 2,094 · Forman -425,295,840
#5
Forman -390,721,720
1154404317 → 1295819167
Weight 1,814 · Forman -390,721,720
#6
Forman -374,492,912
1104900265 → 1154404317
Weight 1,825 · Forman -374,492,912
#7
Forman -367,772,354
1104900265 → 1568407781
Weight 1,713 · Forman -367,772,354
#8
Forman -278,939,727
1568407781 → 1780768689
Weight 1,604 · Forman -278,939,727
Strongest referral edges
#1
Weight 3,146
1497839302 → 1568407781
Weight 3,146 · Forman -496,519,365
#2
Weight 3,015
1154404317 → 1497839302
Weight 3,015 · Forman -479,486,923
#3
Weight 2,472
1154404317 → 1568407781
Weight 2,472 · Forman -610,959,846
#4
Weight 2,178
1295819167 → 1497839302
Weight 2,178 · Forman -267,781,261
#5
Weight 2,094
1295819167 → 1568407781
Weight 2,094 · Forman -425,295,840
#6
Weight 1,921
1104900265 → 1497839302
Weight 1,921 · Forman -233,610,219
#7
Weight 1,825
1104900265 → 1154404317
Weight 1,825 · Forman -374,492,912
#8
Weight 1,814
1154404317 → 1295819167
Weight 1,814 · Forman -390,721,720