| NPI | LastName | FirstName | MidName | Organization | Mailing Address | City | State | Zip |
| 1346361573 | | | | MATTHEW J. SACKS, M.D., P.C. | PO BOX 476 | WALLA WALLA | WA | 993620013 |
| 1497083331 | | | | ONCOLOGY SERVICES PLLC | PO BOX 481 | WALLA WALLA | WA | 993620013 |
| 1679785109 | | | | SEYMOUR MAYNARD BRONSTEIN,P.S. | P O BOX 297 | WALLA WALLA | WA | 99362 |
| 1982856886 | | | | PROVIDENCE HEALTH & SERVICES - WASHINGTON | PO BOX 34439 | SEATTLE | WA | 981241439 |
| 1063678514 | ASHTON | SPENCER | N | | PO BOX 34439 | SEATTLE | WA | 981241439 |
| 1568476752 | CUNNINGHAM | JAMES | ROBERT | | PO BOX 32 | LIBERTY LAKE | WA | 990190032 |
| 1962458877 | QUACKENBUSH | ROBERT | C | | PO BOX 32 | LIBERTY LAKE | WA | 990190032 |