All 50 states ranked by number of ASCs:
- California: 848
- Florida: 468
- Texas: 458
- Georgia: 386
- Maryland: 341
- New Jersey: 259
- Pennsylvania: 245
- Arizona: 212
- Ohio: 198
- Washington: 183
- New York: 160
- Colorado: 141
- North Carolina: 137
- Tennessee: 137
- Illinois: 134
- Indiana: 134
- Michigan: 112
- Missouri: 101
- Oregon: 92
- Louisiana: 89
- Minnesota: 83
- Nevada: 78
- South Carolina: 77
- Mississippi: 76
- Wisconsin: 75
- Arkansas: 72
- Kansas: 68
- Virginia: 63
- Massachusetts: 56
- Connecticut: 55
- Idaho: 54
- Nebraska: 48
- Utah: 48
- Alabama: 42
- Oklahoma: 39
- Kentucky: 37
- Iowa: 30
- New Hampshire: 28
- Hawaii: 22
- Delaware: 21
- Montana: 20
- New Mexico: 20
- Wyoming: 20
- Alaska: 18
- South Dakota: 15
- Maine: 15
- Rhode Island: 14
- North Dakota: 13
- West Virginia: 8
- Vermont: 2
