Robert A Mairs, DO
Obstetrics & Gynecology · Ontario, OR
At a glance
1050 Sw 3Rd Ave Ste 3200, Ontario, OR 97914-4560
NPPES record updated Sep 23, 2025. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
1050 Sw 3Rd Ave Ste 3200Ontario, OR 97914-4560
Additional reported practice locations
840 Sw 4Th Ave Ste 105Ontario, OR 979142638
Phone: 5418812800
Fax: 5418812825 9850 W St Lukes Dr Ste 320A
Nampa, ID 836877912
Phone: 2087063220
Fax: 2087063221
Education & affiliations
- Medical / professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville
- Graduation year
- 1993
- CMS specialties
- Obstetrics/Gynecology
Practice groups
Reported hospital affiliations
- Good Shepherd Medical Center Hermiston, OR
- Saint Alphonsus Medical Center Ontario Ontario, OR
- Saint Alphonsus Regional Medical Center Boise, ID
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $16.66 |
Reporting companies
| Company | Amount |
|---|---|
| ASTELLAS PHARMA GLOBAL DEVELOPMENT | $16.66 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Obstetrics & Gynecology
- Taxonomy code
- 207V00000X
- Enumeration date
- Nov 28, 2005
- Record updated
- Sep 23, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- DO
Reported taxonomies and licenses
207VG0400X
License reported: O-186 ID
207VG0400X
License reported: DO20644 OR
207V00000X · Primary
License reported: DO20644 OR
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1050 Sw 3Rd Ave Ste 3200Ontario, OR 97914-4560
- Phone
- (541) 881-2325
- Fax
- (208) 914-6701
Mailing address
PO BOX 190930BOISE, ID 837190930
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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