University Of Maryland Med Ctr · Referral network
HSA 21002 · 2017 · 2386 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
-954,549
Median F
-139,287
Min F
-59,056,055
Max F
700
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
4,829
Edges
83,815
Avg clustering
0.600
Density
0.0072
Forman μ
-144.9
Forman σ
171.7
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
473,815
Avg degree
6.71
Max degree
277
Negative F edges
7,923
Positive F edges
77
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 277 · weight 42,177
277
#2
NPI 1245233535
Degree 133 · weight 14,261
133
#3
NPI 1861460008
Degree 157 · weight 13,048
157
#4
NPI 1477591758
Degree 155 · weight 12,306
155
#5
NPI 1376592923
Degree 131 · weight 11,977
131
#6
NPI 1588601140
Degree 122 · weight 10,292
122
#7
NPI 1033323399
Degree 156 · weight 9,412
156
#8
NPI 1275536591
Degree 119 · weight 8,196
119
Most negative curvature
#1
Forman -59,056,055
1245233535 → 1548263908
Weight 1,139 · Forman -59,056,055
#2
Forman -53,822,243
1376592923 → 1548263908
Weight 966 · Forman -53,822,243
#3
Forman -50,518,490
1356344667 → 1548263908
Weight 1,105 · Forman -50,518,490
#4
Forman -48,128,505
1548263908 → 1669771986
Weight 1,011 · Forman -48,128,505
#5
Forman -46,981,536
1548263908 → 1912948605
Weight 963 · Forman -46,981,536
#6
Forman -45,507,826
1346516150 → 1548263908
Weight 903 · Forman -45,507,826
#7
Forman -45,453,478
1548263908 → 1922045541
Weight 897 · Forman -45,453,478
#8
Forman -44,229,371
1548263908 → 1649273954
Weight 851 · Forman -44,229,371
Strongest referral edges
#1
Weight 1,271
1124060215 → 1588601140
Weight 1,271 · Forman -7,519,738
#2
Weight 1,139
1245233535 → 1548263908
Weight 1,139 · Forman -59,056,055
#3
Weight 1,105
1356344667 → 1548263908
Weight 1,105 · Forman -50,518,490
#4
Weight 1,011
1548263908 → 1669771986
Weight 1,011 · Forman -48,128,505
#5
Weight 972
1376592923 → 1922045541
Weight 972 · Forman -7,146,976
#6
Weight 966
1376592923 → 1548263908
Weight 966 · Forman -53,822,243
#7
Weight 963
1548263908 → 1912948605
Weight 963 · Forman -46,981,536
#8
Weight 903
1346516150 → 1548263908
Weight 903 · Forman -45,507,826