United Medical Center · Referral network
HSA 9001 · 2014 · 1317 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
-484,903
Median F
-118,200
Min F
-15,792,521
Max F
240
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,822
Edges
28,454
Avg clustering
0.568
Density
0.0172
Forman μ
-70.9
Forman σ
86.5
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
404,997
Avg degree
12.15
Max degree
185
Negative F edges
7,944
Positive F edges
56
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 1922093962
Degree 185 · weight 19,813
185
#2
NPI 1184760662
Degree 169 · weight 13,880
169
#3
NPI 1598719981
Degree 181 · weight 11,738
181
#4
NPI 1841309168
Degree 130 · weight 10,448
130
#5
NPI 1952397382
Degree 104 · weight 9,733
104
#6
NPI 1235186487
Degree 161 · weight 8,492
161
#7
NPI 1801003801
Degree 125 · weight 7,825
125
#8
NPI 1992781637
Degree 119 · weight 7,607
119
Most negative curvature
#1
Forman -15,792,521
1205887106 → 1922093962
Weight 750 · Forman -15,792,521
#2
Forman -14,491,031
1447559208 → 1922093962
Weight 647 · Forman -14,491,031
#3
Forman -13,867,661
1477796704 → 1922093962
Weight 657 · Forman -13,867,661
#4
Forman -13,353,797
1184760662 → 1952397382
Weight 779 · Forman -13,353,797
#5
Forman -13,074,796
1851322382 → 1922093962
Weight 599 · Forman -13,074,796
#6
Forman -12,771,541
1245399369 → 1922093962
Weight 551 · Forman -12,771,541
#7
Forman -12,680,416
1528350592 → 1922093962
Weight 536 · Forman -12,680,416
#8
Forman -12,097,478
1699785360 → 1922093962
Weight 476 · Forman -12,097,478
Strongest referral edges
#1
Weight 855
1962478578 → 1972578748
Weight 855 · Forman -1,032,968
#2
Weight 779
1184760662 → 1952397382
Weight 779 · Forman -13,353,797
#3
Weight 779
1417104662 → 1649267519
Weight 779 · Forman -204,099
#4
Weight 750
1205887106 → 1922093962
Weight 750 · Forman -15,792,521
#5
Weight 657
1477796704 → 1922093962
Weight 657 · Forman -13,867,661
#6
Weight 656
1841309168 → 1962511089
Weight 656 · Forman -6,624,337
#7
Weight 652
1275696015 → 1811931140
Weight 652 · Forman -94,304
#8
Weight 647
1447559208 → 1922093962
Weight 647 · Forman -14,491,031