University Of Maryland Med Ctr · Referral network
HSA 21002 · 2015 · 2324 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
-1,661,696
Median F
-104,004
Min F
-116,103,646
Max F
371.6
From referral_network_features
Precomputed on the full thresholded network (all edges, Python toolkit, unit node weights).
Nodes
4,474
Edges
81,751
Avg clustering
0.595
Density
0.0082
Forman μ
-125.3
Forman σ
138.7
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
483,792
Avg degree
6.88
Max degree
340
Negative F edges
7,915
Positive F edges
85
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 340 · weight 57,863
340
#2
NPI 1861460008
Degree 205 · weight 20,461
205
#3
NPI 1245233535
Degree 146 · weight 16,409
146
#4
NPI 1376592923
Degree 144 · weight 14,764
144
#5
NPI 1588601140
Degree 125 · weight 11,289
125
#6
NPI 1477591758
Degree 159 · weight 10,893
159
#7
NPI 1871561043
Degree 113 · weight 10,442
113
#8
NPI 1346257540
Degree 112 · weight 10,320
112
Most negative curvature
#1
Forman -116,103,646
1245233535 → 1548263908
Weight 1,642 · Forman -116,103,646
#2
Forman -104,299,725
1447291216 → 1548263908
Weight 1,659 · Forman -104,299,725
#3
Forman -102,879,865
1376592923 → 1548263908
Weight 1,311 · Forman -102,879,865
#4
Forman -94,912,223
1548263908 → 1639110315
Weight 1,386 · Forman -94,912,223
#5
Forman -94,662,410
1356344667 → 1548263908
Weight 1,372 · Forman -94,662,410
#6
Forman -94,216,349
1548263908 → 1942341912
Weight 1,361 · Forman -94,216,349
#7
Forman -87,895,938
1346257540 → 1548263908
Weight 1,048 · Forman -87,895,938
#8
Forman -87,844,723
1548263908 → 1912948605
Weight 1,189 · Forman -87,844,723
Strongest referral edges
#1
Weight 1,659
1447291216 → 1548263908
Weight 1,659 · Forman -104,299,725
#2
Weight 1,642
1245233535 → 1548263908
Weight 1,642 · Forman -116,103,646
#3
Weight 1,386
1548263908 → 1639110315
Weight 1,386 · Forman -94,912,223
#4
Weight 1,372
1356344667 → 1548263908
Weight 1,372 · Forman -94,662,410
#5
Weight 1,361
1548263908 → 1942341912
Weight 1,361 · Forman -94,216,349
#6
Weight 1,342
1124060215 → 1588601140
Weight 1,342 · Forman -8,215,687
#7
Weight 1,311
1376592923 → 1548263908
Weight 1,311 · Forman -102,879,865
#8
Weight 1,189
1548263908 → 1912948605
Weight 1,189 · Forman -87,844,723