by Allan Joseph
I wanted to quickly follow up on Tom’s excellent post from yesterday on patient-centered medical homes (PCMHs), which nicely outlined some conflicting results from recent research on the model. (Edited to complete the sentence.)
It really shouldn’t surprise us that PCMHs only saved money in the 10% of patients with the highest risk. Why? Take a look at this chart from the NIHCM, which is one of my favorites in all of health policy:
Notice that the top 10% of spenders (not the same as the top 10% of risk scores, but pretty close) account for just about two-thirds of healthcare spending. The vast majority of patients account for very little spending — there’s no savings to be had there. Healthcare spending is highly concentrated at the top.
Now let’s look at spending from another angle. According to the Robert Wood Johnson Foundation, two-thirds of healthcare spending is on patients with multiple chronic conditions. That means at minimum, roughly one-third of healthcare spending in America is spent on those patients in the top 10% with multiple chronic conditions. (To get even deeper, at least 16% of spending is on patients in the top 10% with three or more chronic conditions.) Of course, that’s only a lower bound — I’d be surprised if the number wasn’t much higher.
So what does this have to do with PCMHs? Well, the core idea behind a PCMH is greatly increased care coordination. That’s precisely the type of intervention that will help sick patients who have multiple chronic diseases — or the very group that accounts for a huge portion of our healthcare spending. No wonder the investment in PCMHs paid off for the sickest patients. They’re the ones where all the money to be saved is.
Given that the vast majority of patients who might use PCMH services account for little health spending, we should expect spending money to build a broad PCMH structure to save money on net. Nor should we be surprised that there’s money to be saved by better coordinating the care of the sickest patients. That’s the whole idea of the “hotspotting” movement. That’s also why Tom was spot-on to focus on the idea of “risk-adjusted population health,” such as focusing care managers on the sickest patients or designing separate clinics that focus exclusively on high-risk patients.
Sometimes it’s worth stepping back and taking stock of our intuitions about what might reduce healthcare costs. If an intervention isn’t aimed at the sickest patients, it’s probably not going to save a lot of money. Don’t be surprised when it doesn’t.
Allan Joseph is a first year medical student at the Warren Alpert Medical School of Brown University, where he is pursuing an MD/MPP. You can follow him on Twitter @allanmjoseph.