| OBF — Assay, Genotyping, Hepatitis C Virus | Class 2 / MI |
| OBH — Monitor, Extracellular Fluid, Lymphedema, Extremity | Class 2 / GU |
| OBI — Catheter, Pressure Monitoring, Cardiac | Class 2 / CV |
| OBJ — Catheter, Ultrasound, Intravascular | Class 2 / CV |
| OBK — Port, Protector/Cushion | Class 2 / HO |
| OBL — Cement, Bone, Pre-Formed, Modular, Polymeric, Vertebroplasty | Class 2 / OR |
| OBM — Cement, Bone, Vertebroplasty, Pre-Formed, Modular | Class 2 / OR |
| OBN — Humidifier, Respiratory, Mask (Direct Patient Interface) | Class 2 / AN |
| OBO — Tomography, Optical Coherence | Class 2 / OP |
| OBP — Transcranial Magnetic Stimulator | Class 2 / NE |
| OBR — Mouthguard, Over-The-Counter | Class U / DE |
| OBT — Plate, Bone, Growth Control, Pediatric, Epiphysiodesis | Class 2 / OR |
| OBV — Eating Disorder Conditioning Tool | Class 2 / NE |
| OBW — 11-Dehydro Thromboxane B2 Kit, Urinary | Class 2 / HE |
| OBY — Condom, Female, Animal Tissue | Class 3 / OB |
| OBZ — Alpha-1-Antitrypsin Kit, Qualitative Phenotype | Class 2 / IM |
| OCB — Rt-Pcr Multigene Expression Test, Sentinel Lymph Node, Cancer Metastasis Detection | Class 3 / IM |
| OCC — Respiratory Virus Panel Nucleic Acid Assay System | Class 2 / MI |
| OCE — Cultured Epithelial Autograft | Class f / SU |
| OCF — Stimulator, Nerve, Electrical, Transcutaneous, Limited Output, Arthritis Pain Relief | Class 2 / NE |
| OCG — Prosthesis, Hip, Pelvifemoral Resurfacing, Metal/Polymer, Uncemented | Class 3 / OR |
| OCH — Oximeter, Infrared, Sporting, Aviation | Class 2 / CV |
| OCI — Indicator, Physical/Chemical, Storage Temperature | Class 2 / HO |
| OCJ — Spinal Channeling Instrument, Vertebroplasty | Class 1 / OR |
| OCK — Transurethral Occlusion Insert, Urinary Incontinence-Control, Female | Class 3 / GU |
| OCL — Surgical Device, For Cutting, Coagulation, And/Or Ablation Of Tissue, Including Cardiac Tissue | Class 2 / CV |
| OCM — Surgical Cardiac Ablation Device, For Treatment Of Atrial Fibrillation | Class 3 / CV |
| OCN — Insulin Autoantibody Kit | Class 2 / IM |
| OCO — Mouthguard, Migraine/Tension Headache | Class U / DE |
| OCQ — Laparoscopic Bladder-Neck Suspension Instrument, Stress Urinary Incontinence | Class 2 / GU |
| OCR — Lung Sound Monitor | Class 2 / AN |
| OCS — Endoscopic Video Imaging System/Component, Gastroenterology-Urology | Class 2 / GU |
| OCT — Anti Fog Solution And Accessories, Endoscopy | Class 2 / GU |
| OCU — Endoscopic Storage Cover | Class 2 / GU |
| OCV — Endoscope Holder | Class 2 / GU |
| OCW — Endoscopic Tissue Approximation Device | Class 2 / GU |
| OCX — Endoscopic Irrigation/Suction System | Class 2 / GU |
| OCY — Endoscopic Guidewire, Gastroenterology-Urology | Class 2 / GU |
| OCZ — Endoscopic Grasping/Cutting Instrument, Non-Powered | Class 2 / GU |
| ODA — Endoscopic Central Control Unit | Class 2 / GU |
| ODB — Endoscopic Contamination Prevention Sheath | Class 2 / GU |
| ODC — Endoscope Channel Accessory | Class 2 / GU |
| ODD — Endoscopic Retrograde Cholangiopancreatography (Ercp) Cannula | Class 2 / GU |
| ODE — Endoscopic Suture/Plication System, Gastroesophageal Reflux Disease (Gerd) | Class 2 / GU |
| ODF — Mini Endoscope, Gastroenterology-Urology | Class 2 / GU |
| ODG — Endoscopic Ultrasound System, Gastroenterology-Urology | Class 2 / GU |
| ODH — Implantable Bladder-Evacuation Electrical Stimulation System | Class f / GU |
| ODI — Administration Set Docking Station | Class 2 / HO |
| ODK — Refractive Corneal Implant | Class f / OP |
| ODN — Ultrafiltration-Controlled Nocturnal Dialysate Delivery System | Class 2 / GU |