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
CHARLESTON SURGERY CENTER, LP	10.1 As expected	2.6 As expected	—	0.9 As expected	0.112	97	97	215
TRIDENT AMBULATORY SURGERY	—	2.3 As expected	4.2 As expected	0.8 As expected	0.1	95	94	458
CENTER FOR ADVANCED SURGERY, LLC	—	2.2 As expected	—	—	0	95	95	249
LOWCOUNTRY AMBULATORY CENTER, LLC	—	—	3.9 Better	—	0.056	96	95	330
LOWCOUNTRY ENDOSCOPY LLC	11.4 As expected	—	—	—	0.035	99	98	126
LOWCOUNTRY OUTPATIENT SURGERY CENTER LLC	—	2.8 As expected	—	—	0.1	97	97	163
SUMMERVILLE ENDOSCOPY CENTER, LLC	10.2 As expected	—	—	—	0.045	97	96	119
THE SOUTHEASTERN SPINE INSTITUTE ASC, LLC	—	2.5 As expected	—	—	0.092	96	97	235
SURGERY CENTER OF CHARLESTON	—	—	—	1.1 As expected	0.056	96	93	109
CHARLESTON ENDOSCOPY CENTER	9.6 As expected	—	—	—	0.016	96	96	106
PALMETTO ENDOSCOPY CENTER,LLC	11.4 As expected	—	—	—	0.074	98	93	25
PALMETTO ENDOSCOPY CENTER MT PLEASANT LLC	8.8 As expected	—	—	—	—	98	98	29
PHYSICIAN'S EYE SURGERY CTR LLC	—	—	—	1.1 As expected	0.015	94	92	385
Mount Pleasant Out Patient Surgery Center, LLC	—	—	—	—	0.053	97	96	171
ROPER ST FRANCIS EYE CENTER	—	—	—	—	—	96	97	228
ELMS ENDOSCOPY CENTER, LLC	12.1 As expected	—	—	—	—	—	—	—

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 16700; the area name is the U.S. Census Bureau's own title for it, not one we invented.