NBA Players Diagnosed With Life-Threatening Diseases

The NBA players most associated with life-threatening diseases include Magic Johnson, who disclosed his HIV diagnosis in 1991; Kareem Abdul-Jabbar, treated for chronic myeloid leukemia; Alonzo Mourning and Sean Elliott, who both underwent kidney transplants; Reggie Lewis, who died of a heart condition at 27; and Jeff Green, who returned to play after open-heart surgery. Their stories reshaped how fans understand illness.

What counts as a life-threatening diagnosis in the NBA

Not every injury belongs on this list. The players below faced conditions that could have ended their lives, not just their careers: viral infection, blood cancer, organ failure, and structural heart disease. What links them is visibility. Because millions had watched these athletes compete, their diagnoses turned abstract medical conditions into human stories, and several used that platform to push fans toward testing, screening, and organ donation.

NBA players who faced life-threatening diagnoses

Player	Diagnosis	Year disclosed	Outcome
Magic Johnson	HIV-positive	1991	Managed with antiretroviral therapy; viral load undetectable; active advocate
Kareem Abdul-Jabbar	Chronic myeloid leukemia	2009 (diagnosed Dec 2008)	Managed with targeted therapy; in remission
Sean Elliott	Focal segmental glomerulosclerosis (kidney)	1999	Kidney transplant from brother; returned to play
Alonzo Mourning	Focal segmental glomerulosclerosis (kidney)	2000	Transplant from cousin; returned and won 2006 title
Reggie Lewis	Hypertrophic cardiomyopathy (heart)	1993	Suffered sudden cardiac death at age 27
Jeff Green	Aortic root aneurysm (heart)	2011	Open-heart surgery; returned and won 2023 title

Magic Johnson and the announcement that changed everything

Earvin “Magic” Johnson learned he was HIV-positive during a routine physical before the 1991-92 season and announced it at a Los Angeles press conference on November 7, 1991, retiring immediately. At the time HIV/AIDS carried enormous stigma built on fear and misinformation. Johnson spoke openly, survived, and briefly returned to basketball, and that combination did more to shift public understanding of the disease than most awareness campaigns of the era. Decades later his viral load remains undetectable on a single daily pill, and he has stayed a prominent HIV/AIDS advocate.

Kareem Abdul-Jabbar and chronic myeloid leukemia

Kareem Abdul-Jabbar was diagnosed with chronic myeloid leukemia in December 2008, long after his record-setting playing career ended, and disclosed it publicly in 2009. He manages the blood cancer with a targeted oral medication that suppresses the abnormal protein driving the disease, and he describes himself as being in remission. Abdul-Jabbar has spoken candidly about the fear of the initial diagnosis and has since used his profile to promote early detection and access to modern treatment for a leukemia most people had never heard of.

Alonzo Mourning’s kidney transplant

Alonzo Mourning was diagnosed with focal segmental glomerulosclerosis in 2000, near the peak of his career, and his kidney function eventually deteriorated to the point that he retired in 2003. The transplant that saved his life came from an unlikely source: an estranged cousin, Jason Cooper, who came forward after seeing news coverage of Mourning’s condition and turned out to be a match. Mourning received the transplant in December 2003, returned to the NBA, and won a championship with the Miami Heat in 2006 before entering the Hall of Fame in 2014.

Sean Elliott’s return after transplant

Sean Elliott of the San Antonio Spurs revealed his kidney disease shortly after the franchise’s 1999 title run and received a kidney from his brother Noel in August 1999. In March 2000 he returned to the court, becoming the first professional athlete to play in a major U.S. sport after a kidney transplant. Doctors called the comeback remarkable, and it brought sustained attention to living organ donation. Elliott has continued to advocate for kidney health and donor awareness in the years since.

Reggie Lewis and a fatal heart condition

Not every story here ends in recovery. Boston Celtics captain Reggie Lewis collapsed during Game 1 of a 1993 playoff series against the Charlotte Hornets. After extensive testing, he died on July 27, 1993, at age 27, suffering sudden cardiac death during an offseason workout. His death was attributed to hypertrophic cardiomyopathy, a thickening of the heart muscle that is the most common cause of sudden cardiac death in young athletes. His loss reshaped how the league approaches cardiac screening.

Jeff Green’s open-heart surgery and comeback

Jeff Green’s aortic root aneurysm was discovered during a 2011 preseason physical with the Celtics, and it was growing at an alarming rate. He underwent open-heart surgery on January 9, 2012, and missed the entire 2011-12 season. Green returned the following year, wore a padded insert beneath his jersey to protect his chest, and went on to a long career, winning an NBA title with the Denver Nuggets in 2023 and remaining an active player in the 2025-26 season.

Where these players stand as of 2026

As of 2026, most of these stories are ongoing testaments to modern medicine. Magic Johnson, honored with the Presidential Medal of Freedom in 2025, and Kareem Abdul-Jabbar both continue to manage chronic conditions while remaining public figures. Alonzo Mourning and Sean Elliott live decades past their transplants and still champion organ donation. Jeff Green is the rare active player on this list, more than a dozen years removed from heart surgery. Reggie Lewis remains the sobering reminder of what is at stake.

The advocacy that outlasts the box score

None of these players retreated from public life after their diagnoses. Most leaned into advocacy, funding research, speaking openly about treatment, and pushing others toward earlier medical care and donor registration. That work, rather than any statistic, is the part of their legacy with the longest reach.