In ACA marketplace, low-hanging fruit is more than half picked

My long two-pointed ladder's sticking through a tree

Toward heaven still,

And there's a barrel that I didn't fill

Beside it, and there may be two or three*

Apples I didn't pick upon some bough.

Goddamn it, don't stop apple-picking now!

(Apologies, Robert Frost)

* or 7 or 8 million

Gearing up for the ACA's third enrollment season, HHS has released an analysis estimating 10.5 million uninsured individuals are eligible to buy private plans in the ACA marketplace. In a separate brief, HHS forecasts that between 2.8 and 3.9 million from this pool  will select marketplace plans in 2016 -- which sounds low until you pick through the numbers a bit.

HHS estimates that 48% of the 10.5 million live in households with incomes under 250% of the Federal Poverty Level (FPL) -- qualifying them for both premium subsidies and Cost Sharing Reduction (CSR) subsidies. Another 30% have incomes between 250% and 400% FPL and so "may qualify" for premium subsidies. But not all of them do.*  And buyers in that range, who are expected to pay at least 8% of income for the benchmark second-cheapest silver plan in their region, have proved a tough sell to date.

About three quarters of all current marketplace enrollees and 88% of subsidized enrollees -- about 7.4 million -- (as of June 30) have incomes under 250% FPL*  If half of the estimated 5 million marketplace-eligible uninsured people with incomes under 250% FPL enroll in plans, and if they constitute about 75% of new enrollees (as they do of current ones), that suggests 3.3 million new enrollees -- almost exactly the midpoint in HHS's forecast range.