An outpatient practice and the ACO it works with want the same thing. The patient who is due for a screening should get it, the visit should happen, and the result should land in the record. On paper the arrangement is clean. The ACO brings the population view and the incentive, the practice brings the panel and the clinicians.
The model is real and it is running at scale. Emory Healthcare and Guidehealth announced a population health collaborative covering more than 350,000 people across Georgia, with over 500 primary care and affiliate providers. Guidehealth supplies the technology and a team of virtual Healthguides who, in Emory's words, work side by side with physicians and clinicians.
That phrase is worth sitting with. Side by side is not the same as inside. It describes people placed alongside a practice, which is a real and useful thing, and it is also the shape that produces the friction below. Gaps stay open longer than either side expects, and the reason is rarely disagreement about what should happen. It is that the work of making it happen sits outside the place where the practice already works.
The work lands outside the record
When an external organization owns a care gap program, the actions it generates tend to arrive somewhere other than the EHR: a portal, a shared list, a spreadsheet, a weekly call. Staff then do the work twice. Once in the system the ACO can see, and once in the record the practice actually runs on.
This is not just what we hear from clinics. A federal review of six Medicare ACOs found that organizations running across multiple EHR systems fell back on phone calls and faxes to move patient data between providers, and named the workload of managing those systems as a source of burnout. Separately, office-based physicians participating in ACOs report higher documentation burden than those who are not, including more after-hours documentation time.
The double entry is the cost people notice. The larger cost is that the two records drift. The list the ACO is working from and the record the practice is working from stop agreeing, and then nobody is certain which one is right.
The program is narrower than the panel
Quality programs score a defined set of measures. That is what makes them administrable, and it is also what makes them partial. A panel does not stop at the measure set, but the incentive does.
There is published concern that as accountability has risen, the pressure encourages organizations to concentrate resources on the measures a program scores while other clinically important work gets less attention. A practice can perform well on the program and still leave real gaps open, because those gaps were never on the scorecard.
The outreach arrives in a voice the patient does not know
The part that surprises people is the response. When outreach comes from an outside organization rather than from the practice, patients engage with it less. A comparison of care management run by physician organizations against the same health plan's own disease management program found engagement higher for the version that came from the practice.
That matches what we hear on the ground. A call from the office a patient has been going to for nine years is a different call from one placed by an organization they have never heard of, even when the message is word for word the same.
Timing is the part nobody owns
There is a moment when closing a gap is easy. The patient is already coming in, the order can be placed at a visit that is already on the schedule, and nobody has to be persuaded to make a separate trip.
Practices know this, which is why pre-visit planning exists as a discipline. The difficulty is that it needs the gap list and the schedule to be read together, on the day, by someone whose job that is. When the gap list lives with the ACO and the schedule lives with the practice, pairing them is a manual task every morning, and it is the first thing to go when the day gets busy.
How much timing is worth is still being measured. There is an active randomized trial testing whether a text nudge before a primary care visit increases gap closure, which is a fair sign the question is live rather than settled.
Where the work should execute
None of this is an argument against working with an ACO. The alignment is real and the incentive points the right way. It is an argument about where the work should run.
When the gap list is computed against the practice's own record, the action is placed in that record, and the outreach goes out under the practice's own name, most of the friction above goes away. Staff stop entering things twice. Two versions of the truth become one. The patient hears from the office they know, at a moment when acting is easy.
The ACO still gets what it came for, which is the closed gap and the evidence that it closed.