TABLE 2

Provider Network Sizes in the ACA Marketplace by Specialty

Limited (<10%)Medium (10%–60%)Large (>60%)Denominator for Network Sizes
N (%)aN (%)aN (%)a
CardiologistPediatric500 (36.1)**321 (23.2)**565 (40.8)*1386
Adult365 (20.6)779 (44.0)625 (35.3)1769
Hematologist/oncologistPediatric389 (40.5)**167 (17.4)**405 (42.1)**961
Adult403 (23.8)700 (41.3)593 (35.0)1696
GastroenterologyPediatric416 (38.2)**249 (22.9)**423 (38.9)**1088
Adult385 (23.3)614 (37.2)653 (39.5)1652
Infectious diseasePediatric264 (38.9)**117 (17.2)**298 (43.9)**679
Adult392 (26.5)481 (32.5)609 (41.1)1482
EndocrinologistPediatric419 (39.1)**219 (20.4)**434 (40.5)**1072
Adult432 (28.4)531 (35.0)556 (36.6)1519
NeurologistPediatric349 (33.8)**288 (27.9)**397 (38.4)**1034
Adult437 (26.0)691 (41.1)555 (33.0)1683
NephrologistPediatric329 (40.8)**126 (15.6)**351 (43.5)**806
Adult389 (23.8)632 (38.6)616 (37.6)1637
PsychiatristPediatric576 (47.0)340 (27.8)**309 (25.2)**1225
Adult794 (46.3)810 (47.2)112 (6.5)1716
Neonatologist574 (50.3)297 (26.0)270 (23.7)1141
  • a Denominator for percentages excludes none available networks that are in areas covered by the network where there are no existing specialists.

  • * Comparisons of networks for pediatric and adult specialists significant at P < .05.

  • ** Comparisons of networks for pediatric and adult specialists significant at P < .001.