Ontario Advanced Surgery Center
1211 W 6th St, Ontario, CA 91762 · (909) 981-8755
CMS Certification Number 05C0001022
- Operating rooms
- 5
- Procedure rooms
- 5
- Ownership
- Proprietary
Case types filed with CMS
Hospital visits after surgery
CMS risk-standardized rate of a hospital visit within 7 days, per 100 cases. The pale band is the 95% interval — where it overlaps the national mark, this center is not meaningfully different from average.
Also filed, without a publishable rate: Urology, General surgery.
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Safety and process measures
No safety measures reported for this center.
What patients said
| Measure | Score (0–100) |
|---|---|
| Overall rating of the facility | 93 |
| Would recommend the facility | 90 |
| Facilities and staff | 97 |
| Communication about the procedure | 93 |
195 completed surveys · 23% response rate · Survey period 10/01/2024 – 09/30/2025
Sources: CMS Provider of Services file (iQIES, 2026 Q2) — address, case types, room counts; CMS ASCQR facility-level file (reporting year 2024) — quality measures; CMS OAS CAHPS facility file — patient experience. Rates are reproduced as CMS publishes them; nothing here is scored or weighted by us. Not medical advice.