Nyu Langone Medical Center · Referral network
HSA 33080 · 2016 · 3000 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
-1,275,876
Median F
-129,208
Min F
-52,004,948
Max F
512.7
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
6,877
Edges
69,259
Avg clustering
0.556
Density
0.0029
Forman μ
-165
Forman σ
263.7
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
475,976
Avg degree
5.33
Max degree
281
Negative F edges
7,860
Positive F edges
140
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 1275621542
Degree 138 · weight 20,523
138
#2
NPI 1851362776
Degree 281 · weight 19,513
281
#3
NPI 1144259433
Degree 210 · weight 19,317
210
#4
NPI 1801815253
Degree 274 · weight 19,299
274
#5
NPI 1578600177
Degree 267 · weight 18,717
267
#6
NPI 1518142306
Degree 244 · weight 16,598
244
#7
NPI 1205831401
Degree 162 · weight 14,718
162
#8
NPI 1194833459
Degree 113 · weight 14,585
113
Most negative curvature
#1
Forman -52,004,948
1801815253 → 1851362776
Weight 886 · Forman -52,004,948
#2
Forman -39,235,136
1194833459 → 1578600177
Weight 1,522 · Forman -39,235,136
#3
Forman -32,537,141
1518142306 → 1578600177
Weight 510 · Forman -32,537,141
#4
Forman -31,772,981
1194833459 → 1518142306
Weight 1,388 · Forman -31,772,981
#5
Forman -30,498,666
1316918824 → 1851362776
Weight 898 · Forman -30,498,666
#6
Forman -29,141,754
1528145075 → 1578600177
Weight 1,047 · Forman -29,141,754
#7
Forman -28,993,725
1316918824 → 1801815253
Weight 873 · Forman -28,993,725
#8
Forman -27,512,529
1174594956 → 1851362776
Weight 873 · Forman -27,512,529
Strongest referral edges
#1
Weight 1,522
1194833459 → 1578600177
Weight 1,522 · Forman -39,235,136
#2
Weight 1,388
1194833459 → 1518142306
Weight 1,388 · Forman -31,772,981
#3
Weight 1,214
1205831401 → 1255422234
Weight 1,214 · Forman -12,779,350
#4
Weight 1,079
1205831401 → 1578557179
Weight 1,079 · Forman -12,009,897
#5
Weight 1,047
1528145075 → 1578600177
Weight 1,047 · Forman -29,141,754
#6
Weight 1,044
1275621542 → 1699709725
Weight 1,044 · Forman -12,049,788
#7
Weight 1,044
1205831401 → 1689824591
Weight 1,044 · Forman -11,798,498
#8
Weight 1,036
1275621542 → 1467549535
Weight 1,036 · Forman -11,817,976