University Of Maryland Med Ctr · Referral network
HSA 21002 · 2016 · 2350 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
-787,912
Median F
-128,215
Min F
-42,774,137
Max F
548
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
4,632
Edges
79,628
Avg clustering
0.603
Density
0.0074
Forman μ
-133.8
Forman σ
159
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
459,355
Avg degree
6.81
Max degree
245
Negative F edges
7,924
Positive F edges
76
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 1548263908
Degree 245 · weight 32,011
245
#2
NPI 1245233535
Degree 138 · weight 15,219
138
#3
NPI 1033323399
Degree 191 · weight 13,919
191
#4
NPI 1912922667
Degree 154 · weight 13,682
154
#5
NPI 1477591758
Degree 165 · weight 13,602
165
#6
NPI 1588601140
Degree 125 · weight 11,201
125
#7
NPI 1376592923
Degree 117 · weight 10,970
117
#8
NPI 1740226729
Degree 116 · weight 9,376
116
Most negative curvature
#1
Forman -42,774,137
1245233535 → 1548263908
Weight 981 · Forman -42,774,137
#2
Forman -35,304,380
1447291216 → 1548263908
Weight 1,038 · Forman -35,304,380
#3
Forman -32,656,494
1376592923 → 1548263908
Weight 675 · Forman -32,656,494
#4
Forman -32,548,924
1356344667 → 1548263908
Weight 889 · Forman -32,548,924
#5
Forman -29,714,471
1548263908 → 1912948605
Weight 750 · Forman -29,714,471
#6
Forman -29,189,705
1548263908 → 1649273954
Weight 721 · Forman -29,189,705
#7
Forman -28,502,668
1548263908 → 1942591078
Weight 691 · Forman -28,502,668
#8
Forman -28,475,709
1346257540 → 1548263908
Weight 568 · Forman -28,475,709
Strongest referral edges
#1
Weight 1,270
1124060215 → 1588601140
Weight 1,270 · Forman -8,128,753
#2
Weight 1,038
1447291216 → 1548263908
Weight 1,038 · Forman -35,304,380
#3
Weight 981
1245233535 → 1548263908
Weight 981 · Forman -42,774,137
#4
Weight 919
1053363341 → 1114997301
Weight 919 · Forman -77,879
#5
Weight 889
1356344667 → 1548263908
Weight 889 · Forman -32,548,924
#6
Weight 803
1033323399 → 1124068721
Weight 803 · Forman -13,969,461
#7
Weight 796
1033323399 → 1760445886
Weight 796 · Forman -13,203,816
#8
Weight 750
1548263908 → 1912948605
Weight 750 · Forman -29,714,471