One quarter of the U.S. population is on Medicaid

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Time for an estimate of Medicaid enrollment growth since the eve of the pandemic, February 2020.  Monthly enrollment growth may finally be slowing, though it probably will not stop until the pause in disenrollments mandated by the Family First Act (passed in March 2020) is ended. Then, watch out: many states will probably commence income/eligibility checks at short intervals with a vengeance. 

As noted my previous update, the cumulative growth rate recorded in my sample, which is based on available monthly reports issued by the states, generally exceeds CMS's official tally (which lags this tally by four months) by about half a percentage point (state reports differ from CMS's official count in numerous ways).  Based on that rule of thumb, I would venture that enrollment nationally is up 16% since February 2020 and now stands at about 82.6 million for all full-service Medicaid programs. That's exactly one quarter of the U.S population. Exclude the undocumented and also legally present noncitizens who are time-barred from Medicaid eligibility, and the percentage is higher still.
[Update, 8/16/21: This estimate was high. The final tally for February is 81.4 million; CMS's total reported increase from Feb. 2020 through March 2021 is 15.6%. So my 34-state estimate is now coming in nearly a full percentage point ahead of final CMS tallies. CMS's preliminary March total is 81.7 million; the final March total will probably come in a bit over 82 million.]

Is the U.S. uninsured rate at an all-time low?

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Enough states have reported Medicaid tallies through February to posit that the pandemic has increased enrollment by more than ten million nationally since February 2020. Adjusting for the usual difference* between CMS's official totals (now posted through November**) and my sample below (based on state monthly reports), year-over-year enrollment growth since February 2020 is likely about 14.8%, and total enrollment likely stands at about 81.7 million. A quarter of the U.S. population is enrolled in Medicaid.

I don't think we've fully fathomed the effect on access to health insurance of the pandemic, the battered and flawed but still functioning and funded ACA programs in place as the pandemic hit, and pandemic relief measures.  Consider...

The Families First Act effectively required states to pause Medicaid disenrollments for the duration of the Covid-19 emergency, and enrollment will continue to grow until that moratorium ends.***  Enrollment growth among those rendered eligible by the ACA Medicaid expansion is close to 30%. In the ACA marketplace, average monthly enrollment in 2021 will probably exceed 2019 enrollment by at least a million, perhaps more, spurred by extended Special Enrollment Periods and subsidies enhanced by the American Rescue Plan Act. As the population ages, Medicare enrollment grows by about 1.5 million yearly. Meanwhile, the huge job losses triggered by the pandemic appear to have had only a modest effect on employer-sponsored insurance: enrollment through September was down by just 2-3 million, according to a KFF estimate.

Medicaid enrollment likely reaches 81 million in January

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Chart updated 3/3/21

This is an update to my recent post estimating total national Medicaid enrollment at upwards of 80 million through December, up from 71.2 million in February 2020, the last month before the pandemic struck the economy.

I've added December updates from four states -- including the big one, California -- to the sample, as well as adding Nebraska, which enacted the ACA Medicaid expansion beginning in October. As I forecast, continued relatively slow growth in California drops the full-sample rate of increase by about two and a half percentage points.  

As always, the official CMS tally for all states, currently stuck in September, is likely to show a somewhat smaller increase than my sample. For September, my sample showed an increase of 9.7% over February, while CMS currently shows a 9.4% increase in the same period.  Conservatively, then, I'll posit that CMS will show a 12.5% increase from February through December 2020, which would put national enrollment at 80.1 million.  (The sample consists of states for which I can find monthly enrollment reports.)[Update, 4/5/21: CMS's preliminary November total shows an increase of 11.6% since February, as I forecast on New  Year's Eve, compared to the 12.0% increase for the same period charted in my sample below.*]

At the New Year, pause to celebrate Medicaid

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Let's ring out 2020 with a final tracking of Medicaid enrollment during the pandemic.

In this 33-state sample, based on state monthly reports, Medicaid enrollment increased 11.1% from February through October, and an estimated 12.1%* from February through November. 

Since the increase reported in CMS's official tallies, currently running through a preliminary August report, generally show about a half percentage point slower growth** than my more up-to-date tally (8.3% vs. 8.8% for August), I imagine that CMS will show an increase of about 11.6%, February through November. That would mean 79.4 million people enrolled through November, an increase of about 8.25 million since February. [Update, 4/5/21: CMS's preliminary November total does indeed show an increase of 11.6% since February.]

At pandemic's peak, Medicaid expansion enrollment is keeping pace

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Deep into fall and a resurgent pandemic, Medicaid enrollment growth among those rendered eligible by the ACA expansion (adults with incomes up to 138% FPL, or $1,468/month for an individual) shows no sign of abating. 

In the 18-state sample below, representing about 36% of the "expansion" population in the 37 states (including D.C.) that have have enacted the ACA expansion thus far, enrollment in this category increased 22.1% from February through October. In fourteen states that have reported through November, enrollment is up 24.7% since October. Month-to-month, enrollment increased 2.2% from September to October (18 states) and 2.3% October to November (14 states). 

Pandemic Medicaid Expansion Enrollment in 18 States

February through November

As long as no one is thrown off Medicaid, will enrollment keep growing by 1% per month?

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I am beginning to wonder. I gather that no one has a precise idea what percentage of Medicaid enrollees are disenrolled every month by state income checks and eligibility redeterminations. The Families First Act paused those disenrollments for the duration of the national emergency -- as of now, through the end of March -- though a new interim final rule issued by Seema Verma's CMS appears to give states a green light to deem some past enrollments "invalid" and void them.

Of course, people continue to disenroll from Medicaid -- when they get a job with affordable insurance, or marry someone with insurance, or move, or age into Medicare (at which point the income thresholds for Medicaid drop in most states), or age out of CHIP, or die...etc. etc. It also seems clear that with 5 million more unemployed in November than in February, despite a snap-back from 14 million newly unemployed at the May peak, demand for Medicaid has grown.

At the same time, the Kaiser Family Foundation recently found that the ranks of those insured through employers have decreased only modestly (-1.5%) in the pandemic. Medicaid enrollment, meanwhile, has continued to grow by 1% per month or more in recent months -- at least by my compilation of state monthly enrollment reports, which shows somewhat more growth that CMS's time-lagged official monthly tally.* Certainly a significant portion, and possibly a very large portion of the enrollment growth is a result of the pause in disenrollments.

ACA Medicaid expansion enrollment continues to swell as pandemic surges

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 As our woes show no sign of abating -- 120,000-plus new Covid-19 cases per day, a million new jobless claims per week -- neither does Medicaid expansion enrollment. This part of the ACA is providing a vital safety net. The sampling below (states that have reported expansion category enrollment through October) indicates that enrollment growth did not slow in October.

How representative is the sample? Well, August growth is about 1 percentage point higher in this sample than in the larger (18-state) sample I posted for that month. California, where Medicaid enrollment has been almost flat in pandemic months, drags down the all-state rate of increase by probably another 2 percentage points. I am pretty confident that expansion-category enrollment growth since February tops 20% nationally. For more about my various assumptions, see this post (and this September update).

Pandemic Medicaid expansion enrollment in 12 states
February thru October 2020

 Idaho increase through August is estimated at a rate comparable to Sept-Oct increase.