Bringing the Tools of Accountable Care to Maternity Care is a Great Idea – But This Sure Ain’t It

By VICTORIA ADEWALE & J.D. KLEINKE

How desperate are we to find some kind of good news about the sorry state of maternity care in America? To find out, look no further than the current cover of no less venerable a health policy journal than Health Affairs.

With the headline “Medicaid ACO Improves Maternity Care” jumping off the cover of its September issue, we were expecting great things from the article “Massachusetts Medicaid ACO Program May Have Improved Care Quality for Pregnant and Postpartum Enrollees” (Megan B. Cole, et al.). The headline certainly promises some rare good news for all of us working to fix the national embarrassment that is maternity care in the US in general, and the maternal mortality crisis in particular.

But alas, the article itself is one more reminder that process improvements are not outcomes improvements. It is also a classic case of earnest researchers’ tendency to torture retrospective data — because it happens to be available for study — into something that might be useful. While it would be easy to dismiss out of hand the listless findings of this study of data-convenience, the danger here is they may well provide yet more ammunition for skeptical payers not to pay for more care that numerous studies have shown patients desperately need.

The authors make a valiant effort with an elegant study design to glean what they can from the “natural experiment” of analyzing pre- and post-natal care delivered to pregnant patients before and after the implementation of Accountable Care Organizations in Massachusetts. But as another old saw goes: when you have a hammer, everything looks like a nail; and patient enrollment in a primary care ACO, as with this dataset, hardly counts as an independent variable with much power to predict the care utilization and outcomes of maternity care for covered enrollees.

It is well established in the literature – not to mention an accepted truism among providers and patients – that when most women become pregnant, the bulk of their care shifts from the primary care setting to obstetrician/gynecologists (OB/GYNs) and certified nurse-midwives (CNMs). Many researchers and clinicians believe that much of this shift occurs even before a confirmed pregnancy, as a consequence of fertility challenges and pregnancy planning.

The authors did find that pregnant patients newly enrolled in ACOs had a small increase in the number of pre- and post-natal visits.