Valley Hospital Medical Center · Referral network
HSA 29010 · 2017 · 1276 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
-2,988,357
Median F
-1,061,143
Min F
-51,628,283
Max F
958.1
From referral_network_features
Nodes
2,485
Edges
89,997
Avg clustering
0.570
Density
0.0292
Forman μ
-202.3
Forman σ
189.3
Rendered graph structure
Total weight
492,990
Avg degree
12.54
Max degree
446
Negative F edges
7,969
Positive F edges
31
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 1366540973
Degree 446 · weight 29,448
446
#2
NPI 1063420065
Degree 387 · weight 22,822
387
#3
NPI 1942299284
Degree 347 · weight 21,527
347
#4
NPI 1578500336
Degree 307 · weight 18,800
307
#5
NPI 1992933832
Degree 239 · weight 15,838
239
#6
NPI 1548280084
Degree 227 · weight 14,051
227
#7
NPI 1649222167
Degree 189 · weight 12,653
189
#8
NPI 1598161234
Degree 192 · weight 12,543
192
Most negative curvature
#1
Forman -51,628,283
1063420065 → 1366540973
Weight 230 · Forman -51,628,283
#2
Forman -47,112,989
1366540973 → 1427047778
Weight 541 · Forman -47,112,989
#3
Forman -43,447,743
1366540973 → 1639168966
Weight 455 · Forman -43,447,743
#4
Forman -35,556,758
1306028014 → 1366540973
Weight 317 · Forman -35,556,758
#5
Forman -35,458,651
1366540973 → 1942299284
Weight 124 · Forman -35,458,651
#6
Forman -34,108,050
1366540973 → 1386931004
Weight 293 · Forman -34,108,050
#7
Forman -31,151,746
1649359043 → 1942299284
Weight 646 · Forman -31,151,746
#8
Forman -30,572,184
1366540973 → 1528017308
Weight 232 · Forman -30,572,184
Strongest referral edges
#1
Weight 1,116
1659560118 → 1700840659
Weight 1,116 · Forman -4,906,599
#2
Weight 1,107
1700840659 → 1811292253
Weight 1,107 · Forman -4,962,948
#3
Weight 1,075
1437188513 → 1528059672
Weight 1,075 · Forman -6,279
#4
Weight 879
1659560118 → 1811292253
Weight 879 · Forman -8,358,142
#5
Weight 867
1720056633 → 1952358426
Weight 867 · Forman -31,852
#6
Weight 855
1477637023 → 1528439460
Weight 855 · Forman -10,458,402
#7
Weight 805
1073618138 → 1598161234
Weight 805 · Forman -12,064,989
#8
Weight 796
1801122478 → 1811292253
Weight 796 · Forman -4,187,940