Autistic people enrolled in Medicaid had an average life expectancy at birth of 64.9 years, roughly 14 years below the U.S. general population, according to one of the largest analyses of mortality in autistic Americans yet published.
The study, published in JAMA Network Open by researchers at Columbia University Mailman School of Public Health and the University of Colorado Anschutz Medical Campus, linked Medicaid records to National Death Index data for beneficiaries in all 50 states and the District of Columbia from 2000 through 2020.
The figure describes a specific population, not every autistic person, and that distinction should travel with the number wherever it goes. Medicaid serves low-income Americans and people with disabilities, so autistic enrollees tend to have higher support needs and greater medical complexity than the broader autistic population. What the study offers families is something narrower but more useful than a headline: a list of the conditions that were killing people early, most of which are treatable.
Inside the Numbers Behind the 64.9 Year Estimate
Over the 21-year period, more than 2 million people with an autism spectrum disorder diagnosis were enrolled in Medicaid, and 18,268 of them died. About 76 percent were men. Roughly 49 percent were White, 17 percent Hispanic, and 15 percent Black.
Life expectancy at birth for autistic Medicaid beneficiaries was 5.6 years shorter than for the overall Medicaid population and 13.8 years shorter than for the U.S. population as a whole, according to Columbia's summary of the findings. Estimates were broadly similar across sex and racial and ethnic groups, though the gap relative to the general population was wider for women than for men. Autistic women lived 16 years less than women in the general population, compared with 11.6 years for autistic men. Overall, autistic beneficiaries had a 44 percent higher risk of death than other Medicaid beneficiaries.
There was measurable improvement over time. Life expectancy in this group rose 1.7 years, from 63.9 in the 2000 to 2004 period to 65.6 in 2015 to 2019. The gap compared with other groups did not close at the same pace, and the first year of the COVID-19 pandemic reversed some gains, with autistic beneficiaries showing the largest decline among the groups studied, 4.1 years relative to the preceding period.
This is an observational analysis of administrative records. It documents how long people lived and what they died of. It does not establish that autism itself shortens life, and the authors point toward care and support gaps rather than the condition as the driver.
Flu, Pneumonia, and Injury Drove Much of the Gap
The excess deaths were not concentrated in one rare condition. Researchers found elevated mortality across most disease categories, with the sharpest excesses in deaths from influenza, malnutrition, pneumonitis caused by inhaling solids or liquids, non-vehicle accidents, drowning and pneumonia.
That pattern drew attention from infectious disease researchers because influenza-related death showed the largest excess of any cause, as CIDRAP reported. Influenza is vaccine-preventable. Pneumonia risk can be reduced with vaccination and by identifying swallowing and aspiration problems. Malnutrition and drowning point to nutrition screening and water safety.
Guohua Li, professor of epidemiology at Columbia Mailman and lead author, said "much of the excess mortality among people with ASD is avoidable" through improved social support, primary care, and home- and community-based services. Coauthor Carolyn DiGuiseppi of the University of Colorado noted that the estimate is close to general-population life expectancy in countries such as Haiti and Angola, and called the finding sobering.
An independent researcher not involved in the work saw the contribution as methodological as much as clinical. David Mandell, a psychiatrist and director of the Center for Mental Health at the University of Pennsylvania Perelman School of Medicine, told Gizmodo that "calculating life expectancy is a much more powerful and intuitive way" to show these differences than earlier risk-of-death comparisons, and said the estimates were carefully and appropriately calculated.
The Findings Do Not Describe Every Autistic Person
The study's own authors flag the central limitation. Because Medicaid primarily covers low-income people and those with disabilities, the results may not represent autistic people who are privately insured, employed or living independently. Enrollees are likely to have more severe symptoms, higher support needs and greater socioeconomic disadvantage, which the authors say could bias the estimate downward. Earlier United Kingdom research produced higher life expectancy estimates for autistic adults without a co-occurring learning disability, which is consistent with a population effect rather than a fixed feature of autism.
Nothing in the findings changes current medical guidance, and no reader should treat the number as a personal prognosis.
What families and caregivers can reasonably take from it is a checklist of conversations worth having at the next appointment. Whether the person is current on flu and pneumococcal vaccination. Whether swallowing or aspiration risk has ever been assessed, particularly for someone with limited communication. Whether nutrition and weight are being tracked rather than assumed. Whether water-safety planning fits the person's abilities, since drowning risk is elevated. And whether adult primary care is actually in place, because the transition out of pediatric care is where many autistic adults lose continuity.
Access is the harder part. Adults on Medicaid often face long waits for specialists who accept the coverage, and home- and community-based services carry waiting lists in many states. Caregivers can ask state developmental disability agencies about waiver programs, and can request care coordination through a Medicaid managed care plan, which is sometimes available but rarely offered unprompted.
Two things remain unresolved. The analysis ends in 2020, so it cannot show whether the modest gains resumed after the pandemic year. And because the data are administrative, they cannot explain why specific deaths occurred, only what was recorded. Additional coverage of the life expectancy gap notes the authors' call for research covering autistic people outside Medicaid. MedicalDaily will follow subsequent analyses extending the data past 2020.
Key Questions Answered
What did the study actually measure? It estimated life expectancy and causes of death for more than 2 million autistic people enrolled in Medicaid between 2000 and 2020, using Medicaid records linked to National Death Index data.
Does this mean all autistic people live 14 years less? No. The estimate applies to autistic Medicaid beneficiaries, a group with higher support needs and greater medical complexity than the broader autistic population. The authors say results may not generalize.
Does autism itself shorten life? The study does not show that. It is observational and identifies associations with specific causes of death, many of them preventable, which researchers attribute to gaps in care and support.
Which causes of death contributed most? Influenza showed the largest excess, followed by malnutrition, pneumonitis from inhaling solids or liquids, non-vehicle accidents, drowning and pneumonia.
Is there any good news in the data? Life expectancy in this group rose 1.7 years between the 2000 to 2004 and 2015 to 2019 periods, though the gap with other populations did not close proportionally.
What should caregivers ask a doctor about? Vaccination status, swallowing and aspiration risk, nutrition and weight monitoring, water safety planning, and whether adult primary care and care coordination are in place.
Who conducted the research? Researchers at Columbia University Mailman School of Public Health and the University of Colorado Anschutz Medical Campus, with the findings published in JAMA Network Open.
