| Business | Phone |
| Representative Dave Mastin 26 E Main St, Walla Walla 99362 | (509) 527-4111 |
| Representative Dave Mastin Office 13 1/2 E Main St # 211, Walla Walla 99362 | (509) 527-4111 |
| Long Term Care Office 206 W Poplar St, Walla Walla 99362 | (509) 527-4614 |