Concierge Medicine, Direct Primary Care, and the Quiet Subtraction of Physician Capacity: What Shrinking Panels Do to Wait Times, Access, and Everyone Who Cannot Write the Check
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Table of Contents
The letter that shows up in the mail
How many doctors have actually left, and how to count them
Panels, visits, and the math of subtraction
Why a five percent capacity loss does not feel like five percent
The zip code problem
What the doctors are actually buying
The other kind of opting out, the one the payers are paying for
Who is left holding the residual
What this does to wait times, and what wait times do to people
The offsetting argument that deserves a fair hearing
Policy levers that exist, ranked by how little anyone wants to pull them
What to watch over the next thirty-six months
Abstract
Roughly 12,000 to 15,000 US physicians now practice in concierge or direct primary care models, against a primary care base of somewhere around 270,000. That is 4 to 6 percent of the workforce.
The relevant unit is not headcount, it is panel size. A conventional panel runs 2,000 to 2,500. Concierge runs 300 to 600. DPC runs 600 to 800. Each conversion subtracts roughly 1,500 to 2,000 patient slots and 2,500 to 3,000 annual visits.
National capacity loss lands at 5 to 6 percent of primary care visit volume. That number is deceptive twice over: queues are convex in utilization, and concierge is geographically concentrated in maybe 40 metros.
The essay models the convexity explicitly. Removing 3 to 5 percent of supply from a system already running at 90 percent plus utilization can move waits 40 to 70 percent.
Concierge is a symptom of panel-size arbitrage, not the cause. Medicare Advantage capitation buys the same panel reduction with different money. The residual population is commercial fee-for-service and Medicaid.
Counterargument gets a fair hearing: retention effects. A doc who stays until 68 at 40 percent capacity beats a doc who quits at 58 at zero.
Policy section covers HSA treatment of DPC memberships, GME caps, Medicaid rate floors, scope of practice, and why none of them are getting pulled hard.
The letter that shows up in the mail
It usually arrives in a heavy envelope, which is the first tell. Good stock, real printing, the kind of thing that does not come from a practice management system. Inside is a note from a physician the recipient has seen for eleven years explaining that the practice is transitioning to a new model, that the transition allows for more time per visit and same day access and a direct cell number, and that the annual fee is $2,200. There is a deadline. There is a form. There is a line about how much the relationship has meant.
What the letter does not say is the part that matters analytically. A typical conversion of this kind involves a physician with somewhere between 1,800 and 2,600 patients on the books moving to a capped panel of 400 to 600. So roughly 1,400 to 2,100 people get the heavy envelope and do not send back the form. They get a second letter, usually 60 to 90 days out, with a list of accepting practices in the area and a note about records transfer. Then they go find someone.
That is the whole phenomenon in miniature, and it is worth sitting with before getting to the models, because the models can make it sound like a supply curve shifting. It is not a curve shifting. It is a specific person in Naples or Scarsdale or Highland Park who has to call nine offices, get told six of them are closed to new patients, get quoted a 47 day wait at the seventh, and end up at an urgent care staffed by someone who has never met them. Multiply by a few million and the aggregate statistics start to make sense.
The interesting question is not whether this is happening. It obviously is. The interesting question is how much capacity has actually left, whether the departure is linear or nonlinear in its effects, and whether concierge medicine is the disease or just the most visible rash.
