Yale-New Haven Hospital · Referral network
HSA 7013 · 2017 · 1226 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
-2,701,053
Median F
-382,604
Min F
-117,602,308
Max F
794
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,682
Edges
32,326
Avg clustering
0.600
Density
0.0229
Forman μ
-168.1
Forman σ
201.1
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
376,977
Avg degree
13.05
Max degree
574
Negative F edges
7,954
Positive F edges
46
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 1558359752
Degree 574 · weight 36,211
574
#2
NPI 1619159050
Degree 291 · weight 17,290
291
#3
NPI 1972591063
Degree 248 · weight 13,138
248
#4
NPI 1124039490
Degree 241 · weight 12,646
241
#5
NPI 1790731354
Degree 222 · weight 12,382
222
#6
NPI 1063513703
Degree 206 · weight 11,770
206
#7
NPI 1487740122
Degree 220 · weight 10,971
220
#8
NPI 1952344418
Degree 196 · weight 10,007
196
Most negative curvature
#1
Forman -117,602,308
1558359752 → 1972591063
Weight 986 · Forman -117,602,308
#2
Forman -108,259,233
1124039490 → 1558359752
Weight 849 · Forman -108,259,233
#3
Forman -88,027,861
1306909825 → 1558359752
Weight 652 · Forman -88,027,861
#4
Forman -84,905,215
1033119524 → 1558359752
Weight 581 · Forman -84,905,215
#5
Forman -73,735,004
1245493428 → 1558359752
Weight 513 · Forman -73,735,004
#6
Forman -67,961,709
1558359752 → 1972717395
Weight 430 · Forman -67,961,709
#7
Forman -58,477,610
1558359752 → 1821009960
Weight 313 · Forman -58,477,610
#8
Forman -53,031,586
1487740122 → 1558359752
Weight 217 · Forman -53,031,586
Strongest referral edges
#1
Weight 2,650
1831207018 → 1851440077
Weight 2,650 · Forman -8,468,175
#2
Weight 1,118
1285846790 → 1669460366
Weight 1,118 · Forman -7,051,755
#3
Weight 986
1558359752 → 1972591063
Weight 986 · Forman -117,602,308
#4
Weight 975
1003806456 → 1013907476
Weight 975 · Forman -2,068,327
#5
Weight 849
1124039490 → 1558359752
Weight 849 · Forman -108,259,233
#6
Weight 761
1013907476 → 1285954180
Weight 761 · Forman -1,315,295
#7
Weight 742
1003806456 → 1235177767
Weight 742 · Forman -928,708
#8
Weight 740
1306862495 → 1649298142
Weight 740 · Forman -599,224