severe illness requiring prolonged hospitalization or recovery; usually involves high costs for hospitals and doctors and medicines
U.S. National Library of Medicine
An acute or prolonged illness usually considered to be life-threatening or with the threat of serious residual disability. Treatment may be radical and is frequently costly.
The numerical value of catastrophic illness in Chaldean Numerology is: 2
The numerical value of catastrophic illness in Pythagorean Numerology is: 7