| Profession: | Medicine |
| Nickname: | Tramless Tom |
| Birth Name: | Thomas Francis O'Brien |
| Dob: | January 28, 1929 |
| Age: | 91 years |
| Height: | 6.1 Fit |
| Weight: | 86 Kg |
| Spouse: | Ruthe Reardon |
| Children: | Conan Christopher O'Brien Luke O'Brien Neal O'Brien Justin O'Brien Kate B. O'Brien Jane O'Brien |
| Father's Name: | James O'Brien |
| Mother's Name: | Johanna O'Dwyer |
| Siblings: | Conan Christopher O'Brien Luke O'Brien Neal O'Brien Justin O'Brien Kate B. O'Brien Jane O'Brien |
| Education: | Harvard Medical School (1954), College of the Holy Cross |
| Country: | Worcester, Massachusetts, United States |
| Career: | Medicine |
| Net Worth: | Not Known |
