Uc Davis Medical Center · Referral network
HSA 5200 · 2016 · 1193 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
-3,325,067
Median F
-355,614
Min F
-187,699,430
Max F
198
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,531
Edges
22,907
Avg clustering
0.617
Density
0.0196
Forman μ
-110.3
Forman σ
141.6
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
509,567
Avg degree
13.41
Max degree
393
Negative F edges
7,971
Positive F edges
29
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 1497827562
Degree 393 · weight 45,265
393
#2
NPI 1942282801
Degree 362 · weight 37,676
362
#3
NPI 1215955844
Degree 292 · weight 29,241
292
#4
NPI 1467524520
Degree 271 · weight 24,800
271
#5
NPI 1245289545
Degree 218 · weight 22,203
218
#6
NPI 1659450047
Degree 190 · weight 21,992
190
#7
NPI 1982686978
Degree 246 · weight 20,364
246
#8
NPI 1326029794
Degree 139 · weight 10,931
139
Most negative curvature
#1
Forman -187,699,430
1497827562 → 1942282801
Weight 1,847 · Forman -187,699,430
#2
Forman -152,222,181
1215955844 → 1497827562
Weight 1,718 · Forman -152,222,181
#3
Forman -124,448,196
1245289545 → 1497827562
Weight 1,574 · Forman -124,448,196
#4
Forman -115,199,072
1215955844 → 1942282801
Weight 1,326 · Forman -115,199,072
#5
Forman -109,700,061
1497827562 → 1982686978
Weight 1,175 · Forman -109,700,061
#6
Forman -93,393,499
1245289545 → 1942282801
Weight 1,263 · Forman -93,393,499
#7
Forman -82,912,412
1942282801 → 1982686978
Weight 949 · Forman -82,912,412
#8
Forman -80,328,250
1326029794 → 1497827562
Weight 900 · Forman -80,328,250
Strongest referral edges
#1
Weight 1,847
1497827562 → 1942282801
Weight 1,847 · Forman -187,699,430
#2
Weight 1,718
1215955844 → 1497827562
Weight 1,718 · Forman -152,222,181
#3
Weight 1,574
1245289545 → 1497827562
Weight 1,574 · Forman -124,448,196
#4
Weight 1,351
1477581106 → 1548572324
Weight 1,351 · Forman -341,188
#5
Weight 1,326
1215955844 → 1942282801
Weight 1,326 · Forman -115,199,072
#6
Weight 1,263
1245289545 → 1942282801
Weight 1,263 · Forman -93,393,499
#7
Weight 1,175
1497827562 → 1982686978
Weight 1,175 · Forman -109,700,061
#8
Weight 1,158
1215955844 → 1245289545
Weight 1,158 · Forman -65,781,942