Yale-New Haven Hospital · Referral network
HSA 7013 · 2015 · 1194 physicians · 7751 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
-7,753,836
Median F
-376,455
Min F
-416,090,622
Max F
556
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,522
Edges
26,436
Avg clustering
0.619
Density
0.0228
Forman μ
-175.3
Forman σ
230.4
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
418,311
Avg degree
12.98
Max degree
699
Negative F edges
7,709
Positive F edges
42
Nonzero F edges
7,751
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 1558359752
Degree 699 · weight 60,846
699
#2
NPI 1972591063
Degree 561 · weight 39,363
561
#3
NPI 1619159050
Degree 345 · weight 27,078
345
#4
NPI 1831351402
Degree 289 · weight 20,176
289
#5
NPI 1952344418
Degree 286 · weight 18,176
286
#6
NPI 1790731354
Degree 242 · weight 15,207
242
#7
NPI 1063513703
Degree 236 · weight 13,744
236
#8
NPI 1306909825
Degree 216 · weight 10,928
216
Most negative curvature
#1
Forman -416,090,622
1558359752 → 1972591063
Weight 2,072 · Forman -416,090,622
#2
Forman -214,153,425
1306909825 → 1558359752
Weight 1,163 · Forman -214,153,425
#3
Forman -192,881,409
1033119524 → 1558359752
Weight 1,003 · Forman -192,881,409
#4
Forman -151,904,631
1245493428 → 1558359752
Weight 662 · Forman -151,904,631
#5
Forman -147,692,663
1558359752 → 1821009960
Weight 597 · Forman -147,692,663
#6
Forman -124,717,498
1023006269 → 1558359752
Weight 450 · Forman -124,717,498
#7
Forman -123,235,396
1124039490 → 1558359752
Weight 430 · Forman -123,235,396
#8
Forman -121,937,242
1558359752 → 1619159050
Weight 286 · Forman -121,937,242
Strongest referral edges
#1
Weight 2,072
1558359752 → 1972591063
Weight 2,072 · Forman -416,090,622
#2
Weight 1,163
1306909825 → 1558359752
Weight 1,163 · Forman -214,153,425
#3
Weight 1,024
1619159050 → 1831351402
Weight 1,024 · Forman -71,329,835
#4
Weight 1,003
1033119524 → 1558359752
Weight 1,003 · Forman -192,881,409
#5
Weight 862
1003806456 → 1013907476
Weight 862 · Forman -2,033,723
#6
Weight 856
1619159050 → 1952344418
Weight 856 · Forman -63,783,383
#7
Weight 855
1003806456 → 1194715540
Weight 855 · Forman -2,173,549
#8
Weight 842
1013907476 → 1194715540
Weight 842 · Forman -2,309,865