| ACCESSCARE OKLAHOMA DIALYSIS, LP | Organization | STROUD |
| ALEXANDRIA DIALYSIS LLC | Organization | SHAWNEE |
| ANDREWS DIALYSIS LLC | Organization | LAWTON |
| ARDMORE DIALYSIS RANCH, INC | Organization | ARDMORE |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | HENRYETTA |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | MIDWEST CITY |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | OKLAHOMA CITY |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | TULSA |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | OWASSO |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | SHAWNEE |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | ADA |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | IDABEL |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | OKLAHOMA CITY |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | WOODWARD |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | MUSKOGEE |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | TULSA |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | YUKON |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | EDMOND |
| BIO-MEDICAL APPLICATIONS OF OKLAHOMA, INC. | Organization | PAULS VALLEY |
| BIOMEDICAL APPLICATION OF OKLA | Organization | TULSA |
| BLISS DIALYSIS LLC | Organization | BROKEN ARROW |
| BMA OF OK | Organization | OKLAHOMA CITY |
| BOTTLE DIALYSIS LLC | Organization | MIDWEST CITY |
| CHOICE ONE RENAL CARE OF OKLAHOMA, LLC | Organization | OKLAHOMA CITY |
| CLEVELAND NEPHROLOGISTS, PLLC | Organization | OKLAHOMA CITY |
| CLEVELAND NEPHROLOGY, PLLC | Organization | OKLAHOMA CITY |
| CONCERTO OKLAHOMA LLC | Organization | OKLAHOMA CITY |
| CREEK NATION HOSPITAL & CLINICS | Organization | COWETA |
| DIALYSIS SPECIALISTS OF SEMINOLE OKLAHOMA, LLC | Organization | SEMINOLE |
| DIALYSIS SPECIALISTS OF TULSA, INC. | Organization | TULSA |
| DSI ALTUS, LLC | Organization | ALTUS |
| DVA HEALTHCARE RENAL CARE INC | Organization | OKLAHOMA CITY |
| DVA HEALTHCARE RENAL CARE INC | Organization | PRYOR |
| DVA RENAL HEALTHCARE INC | Organization | OKLAHOMA CITY |
| DVA RENAL HEALTHCARE INC | Organization | OKLAHOMA CITY |
| EUFAULA DIALYSIS CENTER | Organization | EUFAULA |
| FMS MIDWEST DIALYSIS CENTERS, LLC | Organization | PONCA CITY |
| FORT SMITH REGIONAL DIALYSIS CENTER, LLC | Organization | POTEAU |
| FRESENIUS INTEGRIS, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS KIDNEY CARE BRISTOW, LLC | Organization | BRISTOW |
| FRESENIUS MEDICAL CARE - STILLWATER, LLC | Organization | STILLWATER |
| FRESENIUS MEDICAL CARE 5856, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE 5856, LLC | Organization | WARR ACRES |
| FRESENIUS MEDICAL CARE 5856, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE CENTRAL OKLAHOMA CITY DIALYSIS CENTER, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE EDMOND, LLC | Organization | EDMOND |
| FRESENIUS MEDICAL CARE ENID, LLC | Organization | ENID |
| FRESENIUS MEDICAL CARE HERITAGE PARK, LLC | Organization | MIDWEST CITY |
| FRESENIUS MEDICAL CARE MOORE, LLC | Organization | MOORE |
| FRESENIUS MEDICAL CARE OKCD, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE OKCD, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE SOUTHEAST OKLAHOMA CITY, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE SW OKC, LLC | Organization | OKLAHOMA CITY |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | MUSKOGEE |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | SAPULPA |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | HENRYETTA |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | TULSA |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | CLAREMORE |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | TULSA |
| FRESENIUS MEDICAL CARE TULSA, LLC | Organization | TULSA |