One measure shown per center — the one with reportable case volume. Every center reports on a different mix, which is why the full grid below is worth reading.

Center	Colonoscopy nat 9.9	Orthopedic nat 2.4	Urology nat 5.4	General surgery nat 1	Transfer rate	Rating	Recommend	Surveys
Plaza Ambulatory Surgery Center, LLC	9.7 As expected	2.5 As expected	8.2 As expected	0.9 As expected	0.062	96	95	228
The Portland Clinic, LLP	10.2 As expected	2.2 As expected	5.1 As expected	—	0.034	94	95	274
East Portland Surgery Center, LLC	—	—	—	—	0.025	94	92	271
Sunnybrook Ambulatory Surgery Center	9.8 As expected	—	—	—	0.237	95	95	949
Oath Central	—	—	—	—	0.121	90	89	114
The Vancouver Clinic Surgery Center at Salmon Creek	—	2.3 As expected	5.2 As expected	0.9 As expected	0.161	97	96	239
VANCOUVER CLINIC ENDOSCOPY CTR	10 As expected	2.3 As expected	—	—	0.083	93	93	320
East Pavilion Surgery Center	—	3.1 As expected	6.6 As expected	1.3 As expected	0.555	95	96	247
Oregon Outpatient Surgery Center, LLC	—	2.5 As expected	—	—	0.229	94	94	220
Oregon Surgical Institute	—	1.7 As expected	—	—	0.358	98	98	310
SOUTHWEST WASHINGTON REGIONAL SURGERY	—	2 As expected	—	1.1 As expected	0.107	94	93	138
Cascade Spine Center, LLC	—	—	—	—	0.063	94	94	203
Center For Specialty Surgery	—	2.2 As expected	—	—	0.143	96	97	805
Interstate Ambulatory Surgical Center	—	—	—	—	0.104	96	95	822
Northwest Ambulatory Surgery Center, LLC	—	2.4 As expected	—	0.9 As expected	0.067	96	97	190
South Portland Surgical Center, LLC	—	2.3 As expected	—	1 As expected	0	95	95	800
Surgery Center of Mt Scott, LLC	—	2.3 As expected	—	—	0.196	96	94	238
NW Spine and Pain Surgical Center	—	—	—	—	0.036	96	95	278
The Oregon Clinic Endoscopy Center - East	10.1 As expected	—	—	—	0.086	96	95	1096
The Oregon Clinic Endoscopy Center - Newberg	10.4 As expected	—	—	—	0.154	97	97	365
The Oregon Clinic Endoscopy Center - Oregon City	10.9 As expected	—	—	—	0.118	96	96	450
The Oregon Clinic Endoscopy Center - Tualatin	8.6 As expected	—	—	—	0.11	95	95	601
The Oregon Clinic Endoscopy Center - West	10 As expected	—	—	—	0.168	95	96	1307
Pacific Cataract & Laser Institute, Inc. P.C.	—	—	—	—	0	95	93	145
Pacific Cataract & Laser Institute, Inc. P.C.	—	—	—	—	0	95	94	147
Pacific Cataract and Laser Institute Inc PC	—	—	—	—	0	95	96	170
Burnside Surgery Center	—	—	—	—	0.05	94	88	58
NGC Endoscopy Services, LLC	9 As expected	—	—	—	0.042	94	93	272
Northwest Dialysis Access Center	—	—	—	—	0	91	90	50
Eye Health Eastside Surgery Center, LLC	—	—	—	—	—	95	95	172
VANCOUVER EYE CARE SURGERY CENTER	—	—	—	—	0.048	97	97	211
Westside Surgery Center, LLC	—	—	—	—	—	95	93	215
Columbia River Surgery Center, LLC	—	2.2 As expected	—	—	—	94	93	158
McMinnville Surgery Center	—	—	—	—	—	96	95	78
Wilshire Surgery Center	—	—	—	—	—	96	97	166
Kaiser Permanente Salmon Creek Surgery Center	9.9 As expected	—	—	—	—	93	93	658
Sunset Surgical Center, LLC	—	—	—	—	—	—	—	—
SALMON CREEK PLASTIC SURGERY	—	—	—	—	—	—	—	—
Cedar Hills Surgery Center	—	—	—	—	—	—	—	—
PACIFIC GASTROENTEROLOGY PLLC	10.4 As expected	—	—	—	—	—	—	—
Yamhill Valley Surgical Center, Inc	10.8 As expected	—	—	—	—	—	—	—
Meridian Center for Surgical Excellence	—	—	—	—	—	—	—	—
Oath West	—	—	—	—	—	—	—	—
Petroff Center	—	—	—	—	—	—	—	—

Rates are per-100 risk-standardized 7-day hospital visits; "nat" is the national rate for that measure. Rating and Recommend are OAS CAHPS linear mean scores (0–100). A dash means CMS did not report a value — usually too few cases, which is not a bad score.

Sources: CMS Provider of Services file (iQIES, 2026 Q2) for the facility list, specialties and room counts; CMS ASCQR facility-level quality measures; CMS OAS CAHPS patient survey. Metro grouping is by CBSA code 38900; the area name is the U.S. Census Bureau's own title for it, not one we invented.