| Date of birth | |
| Place of birth | Tumbarumba New South Wales |
| Religion | Roman Catholic |
| Occupation | Medical practitioner |
| Address | Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, J O'Regan, Peter Street, Wagga Wagga, New South Wales |
| Enlistment date | |
| Rank on enlistment | Captain |
| Unit name | Medical Officers |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A15 Port Sydney on |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Promotions |
Captain Unit: MED 4 Field Ambulance Promotion date: |
| Recommendations (Medals and Awards) |
Mention in Despatches Awarded, and promulgated, 'London Gazette' No. 31089 (31 December 1918); 'Commonwealth Gazette' No. 61 (23 May 1919). |
| Fate | Returned to Australia |
| Medals |
Military Cross 'For conspicuous gallantry and devotion to duty. He worked continuously throughout the day tending to the wounded under very heavy fire. He set a fine example to all ranks.'
Source: 'Commonwealth Gazette' No. 169 Date: |