U Of Ky Albert B. Chandler Hosp · Referral network
HSA 18045 · 2016 · 1177 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
-2,221,932
Median F
-512,233
Min F
-109,388,772
Max F
168
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
1,548
Edges
30,320
Avg clustering
0.654
Density
0.0253
Forman μ
-139.8
Forman σ
182.8
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
497,154
Avg degree
13.59
Max degree
390
Negative F edges
7,970
Positive F edges
30
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 1326057241
Degree 390 · weight 29,598
390
#2
NPI 1083655708
Degree 269 · weight 26,897
269
#3
NPI 1487652103
Degree 251 · weight 26,657
251
#4
NPI 1154474435
Degree 243 · weight 25,983
243
#5
NPI 1922019280
Degree 238 · weight 24,422
238
#6
NPI 1679591903
Degree 167 · weight 14,660
167
#7
NPI 1518979111
Degree 150 · weight 14,078
150
#8
NPI 1053427872
Degree 113 · weight 10,265
113
Most negative curvature
#1
Forman -109,388,772
1326057241 → 1922019280
Weight 1,787 · Forman -109,388,772
#2
Forman -67,804,365
1326057241 → 1891717732
Weight 1,095 · Forman -67,804,365
#3
Forman -53,712,286
1154474435 → 1487652103
Weight 972 · Forman -53,712,286
#4
Forman -53,028,627
1326057241 → 1770773665
Weight 751 · Forman -53,028,627
#5
Forman -40,743,270
1326057241 → 1447289616
Weight 442 · Forman -40,743,270
#6
Forman -40,672,423
1326057241 → 1386807998
Weight 448 · Forman -40,672,423
#7
Forman -39,905,557
1326057241 → 1922012509
Weight 474 · Forman -39,905,557
#8
Forman -37,242,679
1326057241 → 1740265958
Weight 419 · Forman -37,242,679
Strongest referral edges
#1
Weight 2,202
1194727701 → 1629184593
Weight 2,202 · Forman -1,139,253
#2
Weight 1,787
1326057241 → 1922019280
Weight 1,787 · Forman -109,388,772
#3
Weight 1,382
1023316890 → 1629184593
Weight 1,382 · Forman -585,670
#4
Weight 1,204
1124047717 → 1679501308
Weight 1,204 · Forman -6,889,435
#5
Weight 1,095
1326057241 → 1891717732
Weight 1,095 · Forman -67,804,365
#6
Weight 972
1154474435 → 1487652103
Weight 972 · Forman -53,712,286
#7
Weight 924
1144257163 → 1518979111
Weight 924 · Forman -12,607,310
#8
Weight 916
1518979111 → 1639181654
Weight 916 · Forman -11,421,775