Select Specialty Hospital-Durham · Referral network
HSA 34024 · 2015 · 1049 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
-10,127,878
Median F
-1,555,438
Min F
-323,756,679
Max F
336
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,304
Edges
24,080
Avg clustering
0.706
Density
0.0283
Forman μ
-259.1
Forman σ
303.7
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
561,458
Avg degree
15.25
Max degree
545
Negative F edges
7,978
Positive F edges
22
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 1659454890
Degree 534 · weight 51,704
534
#2
NPI 1154404317
Degree 467 · weight 50,538
467
#3
NPI 1568407781
Degree 545 · weight 50,273
545
#4
NPI 1295819167
Degree 490 · weight 48,598
490
#5
NPI 1497839302
Degree 356 · weight 42,127
356
#6
NPI 1295795201
Degree 239 · weight 24,305
239
#7
NPI 1093775009
Degree 228 · weight 23,470
228
#8
NPI 1275594772
Degree 240 · weight 23,196
240
Most negative curvature
#1
Forman -323,756,679
1568407781 → 1659454890
Weight 1,605 · Forman -323,756,679
#2
Forman -322,864,326
1154404317 → 1659454890
Weight 1,996 · Forman -322,864,326
#3
Forman -317,187,316
1154404317 → 1568407781
Weight 1,919 · Forman -317,187,316
#4
Forman -294,833,627
1295819167 → 1659454890
Weight 1,577 · Forman -294,833,627
#5
Forman -293,776,802
1154404317 → 1295819167
Weight 1,991 · Forman -293,776,802
#6
Forman -290,573,191
1295819167 → 1568407781
Weight 1,526 · Forman -290,573,191
#7
Forman -288,336,142
1497839302 → 1659454890
Weight 2,311 · Forman -288,336,142
#8
Forman -276,672,494
1497839302 → 1568407781
Weight 2,118 · Forman -276,672,494
Strongest referral edges
#1
Weight 2,445
1295819167 → 1497839302
Weight 2,445 · Forman -264,797,391
#2
Weight 2,311
1497839302 → 1659454890
Weight 2,311 · Forman -288,336,142
#3
Weight 2,118
1497839302 → 1568407781
Weight 2,118 · Forman -276,672,494
#4
Weight 1,996
1154404317 → 1659454890
Weight 1,996 · Forman -322,864,326
#5
Weight 1,991
1154404317 → 1295819167
Weight 1,991 · Forman -293,776,802
#6
Weight 1,919
1154404317 → 1568407781
Weight 1,919 · Forman -317,187,316
#7
Weight 1,734
1104900265 → 1154404317
Weight 1,734 · Forman -162,076,479
#8
Weight 1,605
1568407781 → 1659454890
Weight 1,605 · Forman -323,756,679