Total individual market enrollment in health insurance may (finally) be at an all-time ACA-era high

Please see a 2023 update at https://xpostfactoid.substack.com/p/aca-effectuated-enrollment-in-2023 

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In June 2021, I wondered, will attrition in the ACA marketplace go negative?

Until the pandemic struck, enrollment attrition throughout the coverage year in the ACA marketplace was an established norm. Every year, effectuated enrollment (i.e. paid-up enrollment) as of the first month after the end of Open Enrollment (OE) was between 6% and 15% lower than the "plan selection" total as of the end of OE. From February through December, enrollment would downtick by 600-800,000....

This year, we're in a different world. The Biden administration opened an emergency SEP in HealthCare.gov on February 15, extending August 15, and the state exchanges followed suit, with some variations. Then the American Rescue Plan, signed into law on March 11, provided a massive subsidy boost through 2022, with the new subsidies appearing live on HealthCare.gov on April 1, and in state exchanges pretty shortly thereafter.

Well, the results are in, courtesy of CMS's early effectuated enrollment snapshot for 2022, which includes average monthly enrollment and month-by-month enrollment totals for the year prior.* And the answer is: almost! Or, in a sense, yes!  

Average monthly enrollment in 2021 came to 97.8% of  total plan selections as of the end of the year's Open Enrollment Period -- and to 106.3% of the early effectuated enrollment total reported as of February 2021.** 

ACA marketplace enrollment retention, 2016-2022 

Year	End of OE	Post-OE effectuated	Early effectuated/OE	Average monthly	Avg. monthly/OE
2016	12,681,874	10,828,894	85.4%	10,007,113	78.9%
2017	12,216,003	10,526,942	86.2%	9,763,076	79.9%
2018	11,750,175	10,515,192	89.5%	9,895,197	84.2%
2019	11,444,141	10,433,850	91.2%	9,810,613	85.7%
2020	11,409,447	10,592,901	92.8%	10,408,892	91.2%
2021	12,004,365	11,034,220	91.9%	11,734,931	97.8%
2022	14,511,077	13,807,669	95.2%

Sources: CMS state-level public use files and effectuated enrollment snapshots

Surprise/no surprise: ACA marketplace enrollment is UP in 2020 (on-exchange only)

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Mystery of the ACA marketplace: every year since 2016, while total signups during Open Enrollment have ticked down, the percentage of those who effectuate their enrollment by making their first payment has risen.

On Friday CMS released 2020's first Effectuated Enrollment Snapshot, showing enrollment as of February. Enrollment is about 1% higher than in February 2019, though it was about 0.3% lower as of the end of Open Enrollment. It's also slightly higher than in February 2018.  The gap between total plan selections as of the end of Open Enrollment and effectuated enrollment after all first payments are due is the lowest ever.

Just how poor is ACA marketplace takeup?

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If you hadn't looked at the Kaiser Family Foundation's Marketplace Enrollment as a Share of the Potential Population for a while, or the variant for subsidy-eligible enrollment, you would get the impression that the takeup of marketplace offerings has fallen sharply.

That's true, among the unsubsidized, who accounted for 42% of marketplace enrollment in 2016 vs. just 27% this year (see Figure 3 here).  And the picture has never been pretty. But marketplace failure is not as dire as these charts might lead you to believe. And the apparent falloff in enrollment takeup among the subsidy-eligible is an illusion, born of changing methodology and snapshots of different points in the yearly enrollment cycle.

The Kaiser charts that were live through 2017 (and maybe later) reflected enrollment as of March 31, 2016, i.e. after CMS's first-quarter effectuated enrollment snapshot for that year, at which point 87% of those who had selected plans as of the end of Open Enrollment had effectuated (and maintained) coverage. Reported takeup among the population estimated to be eligible for subsidies was 64%. Takeup among all who were eligible for marketplace coverage (i.e., lacking access to employer coverage or public programs like Medicaid and Medicare) was estimated at 40%.  In the current charts, based on enrollment in December 2018, takeup among the subsidy-eligible is estimated at 46%, and among all who might buy marketplace plans at 34%. 

Yow. But...