Mary Tyler Moore's death has been officially attributed to cardiopulmonary arrest, according to a death certificate obtained by ET.
The document also lists aspiration pneumonia, hypoxia (an oxygen deficiency in the tissues) and diabetes mellitus as contributing factors in her death. Moore was diagnosed with diabetes in her 30s.
MORE: Mary Tyler Moore Dies at 80
This news comes after the Hollywood icon was laid to rest during a private ceremony on Sunday at Oaklawn Cemetery in Fairfield, Connecticut. Moore's longtime representative, Mara Buxbaum released a statement after the actress died on Jan. 25 at a Connecticut hospital.
"Today, beloved icon, Mary Tyler Moore, passed away at the age of 80 in the company of friends and her loving husband of over 33 years, Dr. S. Robert Levine," the statement read. "A groundbreaking actress, producer, and passionate advocate for the Juvenile Diabetes Research Foundation, Mary will be remembered as a fearless visionary who turned the world on with her smile."
WATCH: Mary Tyler Moore Laid to Rest in Connecticut
According to a spokesperson for the Oak Lawn Cemetery, Moore was buried in a multi-plot location "that overlooks a large pond."