Robert A Mairs, DO
Robert A Mairs, DO is an Obstetrics/Gynecology in Ontario, Oregon. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1993, 33 years ago. Practices with Saint Alphonsus Medical Center- Ontario Inc, a 41-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Idaho and Oregon.
- Years since qualifying
- 33
- Trained at
- At Still University of Health Sciences, College of Osteo Med, Kirksville
- Licensed in
- ID, OR
- In the registry since
- 2005
- Specialties on file
- 3
What do these letters mean?
- DO — Doctor of Osteopathic Medicine
- A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.
Practice location Address checks out
1050 SW 3rd Ave Ste 3200Ontario, OR 97914-4560
Phone: (541) 881-2325
Fax: (208) 914-6701
Show map & directions
Directions in Google Maps · Apple Maps · OpenStreetMap
Pin is approximate — placed at the ZIP-code centre, not the exact door.
Additional practice locations (2)
- 9850 W St Lukes Dr Ste 320a, Nampa, ID 83687-7912 — (208) 706-3220
- 840 Sw 4th Ave Ste 105, Ontario, OR 97914-2638 — (541) 881-2800
Specialties & licences
| Obstetrics & Gynecology Physician (primary) | Taxonomy 207V00000X · Licence DO20644 (OR) |
|---|---|
| Gynecology Physician | Taxonomy 207VG0400X · Licence O-186 (ID) |
| Gynecology Physician | Taxonomy 207VG0400X · Licence DO20644 (OR) |
Record details
| NPI number | 1124001862 |
|---|---|
| Entity type | Individual (Type 1) |
| Gender | Male |
| Credentials | DO |
| Sole proprietor | No |
| NPI enumerated | November 28, 2005 |
| Last updated in NPPES | September 23, 2025 |
| Certification date | September 23, 2025 |
| Mailing address | Po Box 190930, Boise, ID 83719-0930 |
Medicare enrollment
| Medicare specialty | OBSTETRICS/GYNECOLOGY |
|---|---|
| Medical school | AT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE |
| Graduated | 1993 (33 years in practice) |
| Group practice | Saint Alphonsus Medical Center- Ontario Inc — 41 clinicians |
| Accepts Medicare assignment | Yes — accepts the Medicare-approved amount |
| Practice locations | 7 on file with Medicare |