Valley Hospital Medical Center · Referral network
HSA 29010 · 2015 · 1254 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
-3,733,783
Median F
-770,908
Min F
-87,540,245
Max F
238
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
2,243
Edges
80,271
Avg clustering
0.572
Density
0.0319
Forman μ
-181.3
Forman σ
176.3
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
467,191
Avg degree
12.76
Max degree
542
Negative F edges
7,963
Positive F edges
37
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 542 · weight 42,072
542
#2
NPI 1649222167
Degree 322 · weight 26,520
322
#3
NPI 1063420065
Degree 336 · weight 21,018
336
#4
NPI 1942299284
Degree 353 · weight 19,874
353
#5
NPI 1548296403
Degree 206 · weight 15,906
206
#6
NPI 1952391963
Degree 188 · weight 13,725
188
#7
NPI 1962467845
Degree 272 · weight 13,405
272
#8
NPI 1073775110
Degree 118 · weight 12,262
118
Most negative curvature
#1
Forman -87,540,245
1366540973 → 1649222167
Weight 374 · Forman -87,540,245
#2
Forman -82,339,837
1366540973 → 1639168966
Weight 609 · Forman -82,339,837
#3
Forman -77,573,470
1063420065 → 1366540973
Weight 313 · Forman -77,573,470
#4
Forman -76,557,329
1366540973 → 1427047778
Weight 527 · Forman -76,557,329
#5
Forman -70,972,263
1366540973 → 1528017308
Weight 462 · Forman -70,972,263
#6
Forman -62,438,804
1306028014 → 1366540973
Weight 361 · Forman -62,438,804
#7
Forman -58,204,720
1184630469 → 1366540973
Weight 306 · Forman -58,204,720
#8
Forman -57,881,326
1164429932 → 1366540973
Weight 309 · Forman -57,881,326
Strongest referral edges
#1
Weight 898
1528017308 → 1649222167
Weight 898 · Forman -38,443,063
#2
Weight 857
1023132511 → 1184630469
Weight 857 · Forman -6,356,948
#3
Weight 829
1609823533 → 1740497346
Weight 829 · Forman -2,889,127
#4
Weight 751
1720056633 → 1952358426
Weight 751 · Forman -71,304
#5
Weight 712
1396763587 → 1497924468
Weight 712 · Forman -8,096,717
#6
Weight 644
1245249689 → 1518071208
Weight 644 · Forman -2,004,855
#7
Weight 623
1427153691 → 1629099379
Weight 623 · Forman -627,648
#8
Weight 617
1023064599 → 1336361500
Weight 617 · Forman -4,427,583