University Of Maryland Med Ctr · Referral network
HSA 21002 · 2014 · 2211 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
-1,479,588
Median F
-158,762
Min F
-61,429,377
Max F
326.7
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
4,394
Edges
91,546
Avg clustering
0.612
Density
0.0095
Forman μ
-135.7
Forman σ
146.1
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
505,207
Avg degree
7.24
Max degree
304
Negative F edges
7,941
Positive F edges
59
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 1861460008
Degree 304 · weight 36,909
304
#2
NPI 1548263908
Degree 251 · weight 34,736
251
#3
NPI 1871561043
Degree 179 · weight 21,936
179
#4
NPI 1245233535
Degree 137 · weight 14,519
137
#5
NPI 1104961788
Degree 125 · weight 13,093
125
#6
NPI 1376592923
Degree 139 · weight 12,859
139
#7
NPI 1588601140
Degree 130 · weight 12,095
130
#8
NPI 1740226729
Degree 142 · weight 11,750
142
Most negative curvature
#1
Forman -61,429,377
1225031545 → 1861460008
Weight 1,540 · Forman -61,429,377
#2
Forman -61,221,037
1356344659 → 1861460008
Weight 1,529 · Forman -61,221,037
#3
Forman -51,195,116
1760485122 → 1861460008
Weight 1,077 · Forman -51,195,116
#4
Forman -46,194,998
1124113956 → 1861460008
Weight 882 · Forman -46,194,998
#5
Forman -45,426,803
1245233535 → 1548263908
Weight 994 · Forman -45,426,803
#6
Forman -45,349,488
1649265034 → 1861460008
Weight 850 · Forman -45,349,488
#7
Forman -43,779,022
1366445603 → 1861460008
Weight 791 · Forman -43,779,022
#8
Forman -39,685,719
1376592923 → 1548263908
Weight 766 · Forman -39,685,719
Strongest referral edges
#1
Weight 1,540
1225031545 → 1861460008
Weight 1,540 · Forman -61,429,377
#2
Weight 1,529
1356344659 → 1861460008
Weight 1,529 · Forman -61,221,037
#3
Weight 1,364
1124060215 → 1588601140
Weight 1,364 · Forman -9,038,821
#4
Weight 1,104
1437128592 → 1871561043
Weight 1,104 · Forman -17,400,882
#5
Weight 1,077
1760485122 → 1861460008
Weight 1,077 · Forman -51,195,116
#6
Weight 1,012
1548263908 → 1942341912
Weight 1,012 · Forman -37,549,837
#7
Weight 994
1245233535 → 1548263908
Weight 994 · Forman -45,426,803
#8
Weight 972
1104961788 → 1114994399
Weight 972 · Forman -7,847,320