Part 9: The Fourth Trimester: The Coverage Cliff Nobody Fixed

Part 9 of Structural Inequity in Prenatal Care

More than half of pregnancy-related deaths in the United States occur after delivery. Under the historical Medicaid structure, coverage ended 60 days postpartum. For Black women, whose Medicaid coverage finances 65% of their births, this created a cliff: survive the delivery, lose the insurance, die weeks later of a cardiovascular complication that anyone with a blood pressure cuff and a follow-up appointment could have caught. This is not a complex policy problem. It is a billing decision.

The American obstetric system has, for most of its modern history, been organized around a delivery event. Nine months of prenatal care, the delivery, and then a single postpartum visit at six weeks. If a woman was covered by pregnancy-related Medicaid, her coverage extended to 60 days after the end of her pregnancy and then terminated. Whether she had recovered fully, whether she had developed new symptoms, whether her blood pressure had normalized, whether her mental health was stable, whether she had a primary care physician: these were questions whose answers were not required before the coverage clock ran out.

This structure did not emerge from clinical evidence about postpartum recovery timelines. It emerged from a legislative decision in which 60 days was deemed sufficient. The clinical evidence has been accumulating for decades to suggest that 60 days is far from sufficient, and that the deaths occurring after that coverage cliff are not random. They fall disproportionately on Black women, on low-income women, on the women whose Medicaid coverage ends precisely when their clinical vulnerability continues.

The fourth trimester, the 12-week period following delivery during which the maternal body undergoes dramatic physiological change, has received increasing clinical attention over the past decade. It has not received proportional policy attention. And the mismatch between the clinical reality of postpartum risk and the policy structure of postpartum coverage is one of the most concrete and tractable sources of excess maternal mortality in the United States.

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Where the Deaths Are

The Centers for Disease Control and Prevention’s data on pregnancy-related mortality by timing are among the most important and least-discussed statistics in the maternal health literature. More than half of all pregnancy-related deaths in the United States occur after delivery. Of those postpartum deaths, 11.7 percent occur between six weeks and one year after delivery. That is the period after which pregnancy-related Medicaid coverage has historically ended.

The causes of these late postpartum deaths are clinically important. Cardiomyopathy, which can present or worsen weeks after delivery. Hypertensive disorders, which do not always resolve at delivery and which can deteriorate in the weeks following. Mental health conditions, including postpartum depression and psychosis, which often peak well after the six-week visit. Thromboembolic disease, which remains elevated for weeks to months postpartum. Sepsis from wound infections or endometritis that develops after hospital discharge. None of these conditions requires a delivery room to kill. All of them are detectable and manageable with outpatient follow-up.

Outpatient follow-up requires insurance coverage and a physician willing to see the patient. For Black women whose Medicaid coverage ended at 60 days, both conditions fail simultaneously at the moment of highest clinical need.

The Scale of the Unmet Need

The magnitude of the postpartum coverage problem is measurable. Research using Medicaid claims data has found that almost half of Medicaid recipients did not attend even a single postpartum visit under the historical 60-day coverage structure. Nearly 70 percent of postpartum spending occurs after 60 days from delivery, meaning the period when coverage ends is the period when clinical needs are greatest in financial terms. These are not outlier findings from small studies. They come from national and state-level Medicaid claims analyses covering hundreds of thousands of deliveries.

The racial dimensions of this coverage gap are direct. Medicaid finances approximately 42 percent of all US births. For Black women, the figure is 65 percent. For Latina women, it is 59 percent. For white women, it is 29 percent. Black women are more than twice as likely as white women to be covered by a program whose postpartum coverage historically ended at 60 days. They are simultaneously the population most affected by postpartum mortality and the population most likely to lose coverage during the period when postpartum mortality risk is highest.

This is not a complex causal inference. It is arithmetic. And it has been arithmetic for the entire history of the modern Medicaid program.

The Policy Response and Its Limits

The American Rescue Plan Act of 2021 gave states the option to extend Medicaid postpartum coverage from 60 days to 12 months. The Consolidated Appropriations Act of 2023 made this option permanent. As of late 2024, 47 states and the District of Columbia had implemented 12-month postpartum extensions.

This is genuine progress. It is one of the most concrete structural improvements in maternal health policy of the past decade, and it has received significantly less attention than implicit bias training mandates. The extension addresses a specific, documented mechanism of harm with a specific, targeted policy intervention. It is the kind of policy that does not generate viral social media content or institutional press releases about commitment to equity. It is a change in a Medicaid state plan amendment that will prevent women from dying.

The limits of this progress deserve attention as well. Three states had not implemented 12-month extensions as of the reference period, including states with among the highest Black maternal mortality burdens in the country. Extension addresses coverage duration; it does not address the provider participation problem. A woman with 12 months of postpartum Medicaid coverage who cannot find an obstetrician, cardiologist, or psychiatrist willing to accept Medicaid has coverage without access. The extension is necessary; it is not sufficient.

There is also the matter of what happens within the 60-day window that has always existed. Research has consistently found that postpartum visit attendance among Medicaid patients is substantially lower than among commercially insured patients. The barriers include transportation, childcare, return to work, and the challenge of navigating a healthcare system that often does not feel welcoming. Extension of coverage duration does not automatically improve attendance. It is a prerequisite for attendance, not a guarantee of it.

The Global Billing Structure and Postpartum Incentives

The postpartum coverage gap interacts with a billing structure that has shaped physician incentives in ways that compound the problem. Under the global obstetric billing package, which covered all routine prenatal visits, the delivery, and postpartum care in a single bundled payment, the economic case for a physician to attend a postpartum visit for a patient she did not manage prenatally is thin.

An obstetrician enrolled in Medicaid who delivered a patient she did not see prenatally, because the patient was receiving prenatal care in a resident clinic, has already collected her delivery-only payment. The postpartum visit, billed separately under the postpartum-only code, represents a modest additional payment for a potentially complex clinical encounter with a patient she does not know well. The financial incentive structure does not favor postpartum engagement with Medicaid patients who came through the two-tier system.

The new CPT code structure taking effect in January 2027 will unbundle prenatal and postpartum visits, making each individually billable. This creates the possibility that individual postpartum visits will be more visibly valued and more consistently performed. It does not change the underlying reimbursement rate, which will still be approximately 72 percent of Medicare for each visit. And it does not change the physician participation decision for practices that have chosen not to accept Medicaid.

The Cardiovascular Dimension

Among the clinical conditions that account for postpartum maternal mortality, cardiovascular disease deserves particular attention because of its prevalence, its treatability when detected, and its racial distribution.

Cardiomyopathy, and specifically peripartum cardiomyopathy, is a condition in which the heart muscle weakens in the final month of pregnancy or in the months following delivery. It accounts for a disproportionate share of pregnancy-related deaths and is more common, more severe, and less likely to recover fully in Black women than in women of other racial and ethnic backgrounds. The reason for this racial difference is not fully understood, but it is well documented in the epidemiological literature.

Peripartum cardiomyopathy is not invisible on the first postpartum visit. A woman who comes in at six weeks with dyspnea on exertion, lower extremity edema, and reduced exercise tolerance can be diagnosed with a clinical examination, an electrocardiogram, and an echocardiogram. These are not exotic tests. They are standard outpatient cardiology tools. The diagnosis requires that she come in. The follow-up requires that she have insurance when she comes in and a provider who will see her.

The 60-day coverage cliff, for a woman whose peripartum cardiomyopathy was subclinical at delivery and became symptomatic at week 10, is potentially lethal. She has symptoms. She has no coverage. She delays seeking care because she is uninsured and the emergency department is frightening and expensive. Her condition deteriorates. This is not a hypothetical. It is the mechanism behind the statistic that 11.7 percent of pregnancy-related deaths occur between six weeks and one year postpartum.

Mental Health: The Invisible Postpartum Crisis

Postpartum mental health conditions are the most common complication of childbirth. Postpartum depression affects between 10 and 15 percent of women after delivery. Postpartum anxiety is comparably common. Postpartum psychosis, while rare, is a psychiatric emergency. These conditions disproportionately affect women under financial stress, women without robust social support networks, and women whose experience of childbirth was marked by trauma or unmet expectations.

They also disproportionately affect women who lose their healthcare coverage at 60 days. The trajectory of postpartum depression typically begins in the first weeks after delivery but often reaches its clinical nadir at two to three months postpartum. The historical 60-day coverage cliff falls precisely at this period of maximum symptom burden for many women. A woman who would have presented to her OB at week 10 with symptoms of depression is now uninsured. She does not present. The depression progresses. In its most severe forms, it contributes to suicide, which is among the leading causes of postpartum death.

The link between postpartum mental health and maternal mortality is not speculative. It is documented in maternal mortality committee reviews across multiple states. Women who died by suicide in the postpartum period were often uninsured, often lacked mental health follow-up, and often had symptoms that were present before coverage ended. The coverage extension does not solve the mental health provider shortage or the stigma that prevents many women from seeking care. But it removes the insurance barrier that is the most concrete obstacle between a symptomatic woman and a clinical encounter.

My Take

The fourth trimester is not a new concept. I have been practicing obstetrics since 1974, and postpartum care has always been part of the specialty. What is new is the documentation, now substantial, of how profoundly the postpartum period shapes maternal survival, and how thoroughly the policy architecture of American maternity coverage has failed to account for that documentation.

The 60-day coverage limit was always a political decision, not a clinical one. It was the decision of a legislature that was willing to pay for a delivery but not for the recovery from that delivery. For women with commercial insurance or continuous Medicaid eligibility through poverty-related categories, the postpartum period was covered. For women whose Medicaid eligibility was pregnancy-specific, the clock ran out at precisely the moment when cardiovascular, psychiatric, and infectious complications were most likely to emerge.

The 12-month extension is the right policy. The states that have implemented it have done the right thing. The states that have not implemented it are making a choice with a documented mortality signal, and that choice falls most heavily on the Black women who are disproportionately covered by pregnancy-related Medicaid and disproportionately affected by postpartum mortality.

I want to close this post by noting the contrast between the policy attention this issue has received and the policy attention devoted to implicit bias training and doula programs. The fourth trimester coverage extension is a concrete, evidence-supported, structurally targeted intervention that addresses a specific documented mechanism of excess maternal mortality. It generates almost no social media content. The bias training mandate generates significant social media content. The doula programs generate advocacy, press releases, and Medicaid billing codes. The coverage extension generates a state plan amendment and a line in a federal budget.

The women who survive because of the coverage extension will never know they survived because of it. That is how structural improvements work. They are invisible in their benefits and auditable only in the aggregate. They do not produce a narrative. They produce a statistic. In this field, the statistics are the lives. Let us be willing to work for statistics that do not generate headlines.

References

1. Petersen EE, Davis NL, Goodman D, et al. Vital Signs: Pregnancy-Related Deaths, United States, 2011-2015, and Strategies for Prevention, 13 States, 2013-2017. MMWR Morb Mortal Wkly Rep. 2019;68(18):423-429.

2. Davis NL, Smoots AN, Goodman DA. Pregnancy-Related Deaths: Data From 14 US Maternal Mortality Review Committees, 2008-2017. Atlanta, GA: CDC; 2019.

3. Ranji U, Salganicoff A, Gomez I. Expanding Postpartum Medicaid Coverage. Kaiser Family Foundation; 2021.

4. Daw JR, Kolenic GE, Dalton VK, et al. Racial and Ethnic Disparities in Perinatal Insurance Coverage. Obstet Gynecol. 2020;135(4):917-924.

5. Battarbee AN, Gleason JL, Vladutiu CJ, Menard MK. Prevalence and Risk Factors of Peripartum Cardiomyopathy Among Hospitalizations With Severe Maternal Morbidity. Obstet Gynecol. 2020;135(3):665-671.

6. Freaney PM, Harrington K, Molsberry R, et al. Temporal Trends in Peripartum Cardiomyopathy in the United States: 2004-2018. Circulation. 2021;144(25):2034-2044.

7. Rodriguez MI, Skye M, Anderson J, et al. Extending Postpartum Medicaid Beyond 60 Days Improves Care Access and Uncovers Unmet Needs in a Texas Medicaid Health Maintenance Organization. Women’s Health Issues. 2022;32(3):243-250.

8. National Academy for State Health Policy. State Efforts to Extend Medicaid Postpartum Coverage. NASHP Tracker; 2025. Available at: nashp.org.

9. Wisner KL, Sit DK, McShea MC, et al. Onset Timing, Thoughts of Self-Harm, and Diagnoses in Postpartum Women With Screen-Positive Depression Findings. JAMA Psychiatry. 2013;70(5):490-498.