How the number of ASCs in the US has changed over time

MedPAC's 2019 commission report to Congress outlined data on ASC characteristics, including where the centers are located and whether they're for profit or nonprofit.

The geographic distribution of ASCs is uneven, according to MedPAC data from 2017. The state that had the most ASCs per Medicare beneficiary was Maryland, with 40 ASCs per 100,000 Part B beneficiaries. Wyoming, Alaska and Georgia followed Maryland at about 20 ASCs per 100,000 Part B beneficiaries. Washington, D.C., West Virginia, Alabama and Vermont all had the fewest ASCs per beneficiary at 4 per 100,000 beneficiaries.

According to the 2017 data, Vermont had only one ASC in the whole state.

2018 MedPAC provider services file data from CMS shows that most ASCs are for profit and urban:

For profit
Open in 2012: 93.6 percent
Open in 2017: 93.8 percent
New in 2017: 92.6 percent

Open in 2012: 3.8 percent
Open in 2017: 3.5 percent
New in 2017: 5.8 percent

Open in 2012: 2.7 percent
Open in 2017: 2.7 percent
New in 2017: 1.6 percent

Open in 2012: 92.5 percent
Open in 2017: 92.9 percent
New in 2017: 94.2 percent

Open in 2012: 7.4 percent
Open in 2017: 7.1 percent
New in 2017: 5.8 percent

Note: Some totals don't add up to 100 percent due to rounding.

New: 176
Closed or merged: 114
Total: 5,216

New: 159
Closed or merged: 90
Total: 5,474

New: 189
Closed or merged: 60
Total: 5,603

Average percentage change
2012-2016: 1 percent
2016-2017: 2.4 percent

More articles on benchmarking:
4 things to know about general surgeon workload, workplace challenges
5 states with the most ASCs
12 statistics on ASC ownership, management

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