Inova Fairfax Hospital · Referral network
HSA 49014 · 2014 · 561 physicians · 3146 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
-870,978
Median F
-241,534
Min F
-18,606,117
Max F
166
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
729
Edges
9,963
Avg clustering
0.534
Density
0.0375
Forman μ
-63.5
Forman σ
78
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
226,561
Avg degree
11.22
Max degree
236
Negative F edges
3,112
Positive F edges
34
Nonzero F edges
3,146
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 1508959636
Degree 236 · weight 19,554
236
#2
NPI 1902874514
Degree 74 · weight 13,381
74
#3
NPI 1790753325
Degree 63 · weight 12,214
63
#4
NPI 1417924663
Degree 46 · weight 11,117
46
#5
NPI 1548370612
Degree 57 · weight 10,590
57
#6
NPI 1427026020
Degree 56 · weight 10,009
56
#7
NPI 1750358776
Degree 47 · weight 9,758
47
#8
NPI 1992772925
Degree 40 · weight 9,506
40
Most negative curvature
#1
Forman -18,606,117
1508959636 → 1588654669
Weight 436 · Forman -18,606,117
#2
Forman -13,975,902
1508959636 → 1952392482
Weight 312 · Forman -13,975,902
#3
Forman -12,851,888
1508959636 → 1598763146
Weight 383 · Forman -12,851,888
#4
Forman -12,621,275
1134288699 → 1508959636
Weight 299 · Forman -12,621,275
#5
Forman -12,511,205
1487698965 → 1508959636
Weight 273 · Forman -12,511,205
#6
Forman -12,267,055
1487652038 → 1508959636
Weight 352 · Forman -12,267,055
#7
Forman -12,142,211
1790753325 → 1902874514
Weight 1,717 · Forman -12,142,211
#8
Forman -11,437,642
1205833258 → 1508959636
Weight 320 · Forman -11,437,642
Strongest referral edges
#1
Weight 1,717
1790753325 → 1902874514
Weight 1,717 · Forman -12,142,211
#2
Weight 1,686
1417924663 → 1902874514
Weight 1,686 · Forman -10,307,631
#3
Weight 1,540
1417924663 → 1790753325
Weight 1,540 · Forman -8,420,045
#4
Weight 1,397
1548370612 → 1902874514
Weight 1,397 · Forman -9,787,740
#5
Weight 1,381
1750358776 → 1902874514
Weight 1,381 · Forman -8,940,813
#6
Weight 1,372
1427026020 → 1902874514
Weight 1,372 · Forman -9,651,655
#7
Weight 1,332
1548370612 → 1790753325
Weight 1,332 · Forman -8,227,349
#8
Weight 1,325
1902874514 → 1992772925
Weight 1,325 · Forman -8,226,671