The number of ASCs operated by the five largest management companies has steadily grown, climbing about 4.7 percent annually since 2011, according to VMG Health.
From 2017 to 2018, the number of centers partnering with a national operator increased from 27.6 percent of all Medicare-certified centers to 28.5 percent.
Center counts for national operators from 2011 to 2018:
Note: VMG based estimates on publicly available data and historical numbers.
AmSurg (Dallas)
2011: 223
2012: 240
2013: 235
2014: 243
2015: 257
2016: 260
2017: 263
2018: 261
United Surgical Partners International (Addison, Texas)
2011: 204
2012: 213
2013: 215
2014: 214
2015: 249
2016: 239
2017: 244
2018: 255
Surgical Care Affiliates (Deerfield, Ill.)
2011: 145
2012: 150
2013: 167
2014: 185
2015: 185
2016: 197
2017: 205
2018: 219
HCA Healthcare (Nashville, Tenn.)
2011: 116
2012: 112
2013: 124
2014: 124
2015: 116
2016: 118
2017: 119
2018: 123
Surgery Partners (Nashville)
2011: 11
2012: 50
2013: 50
2014: 50
2015: 96
2016: 99
2017: 104
2018: 109
SurgCenter Development (Towson, Md.)
2011: 56
2012: 113
2013: 121
2014: 121
2015: 130
2016: 106
2017: 106
2018: 125
Other management/multi-site operators
2011: 584
2012: 445
2013: 467
2014: 442
2015: 483
2016: 494
2017: 504
2018: 533
Centers partnering with major operators
2011: 1,339
2012: 1,323
2013: 1,379
2014: 1,379
2015: 1,516
2016: 1,513
2017: 1,545
2018: 1,625