| OTG — Non-Sars Coronavirus Multiplex Nucleic Acid Assay | Class 2 / MI |
| OTJ — Laparoscopic Single Port Access Device | Class 2 / SU |
| OTK — Wound Drain Catheter System | Class 2 / SU |
| OTL — Femtosecond Laser System For Refractive Correction | Class 3 / OP |
| OTM — Mesh, Surgical, For Stress Urinary Incontinence, Male | Class 2 / GU |
| OTN — Mesh, Surgical, Synthetic, Urogynecologic, For Stress Urinary Incontinence, Retropubic Or Transobturator | Class 2 / GU |
| OTO — Mesh, Surgical, Synthetic, Urogynecologic, For Apical Vaginal And Uterine Prolapse, Transabdominally Placed | Class 2 / OB |
| OTP — Mesh, Surgical, Synthetic, Urogynecologic, For Pelvic Organ Prolapse, Transvaginally Placed | Class 3 / OB |
| OTQ — Research Use Only/Hematology Devices | Class N / HE |
| OTR — Research Use Only/Immunology Devices | Class N / IM |
| OTT — Research Use Only/Microbiology | Class N / MI |
| OTU — Research Use Only/Pathology | Class N / PA |
| OTV — Research Use Only/Clinical Chemistry Devices | Class N / CH |
| OTW — Research Use Only/Clinical Toxicology | Class N / TX |
| OTX — Foot Wrap For Treating Restless Leg Syndrome Symptoms | Class 1 / NE |
| OTZ — Graft Insertion Instrument For Endothelial Keratoplasty | Class 1 / OP |
| OUB — Instrument For Treatment Of Hyperhidrosis | Class 2 / SU |
| OUC — Norovirus Serological Reagent | Class 2 / MI |
| OUE — Micro Total Analysis Instrument System | Class 2 / IM |
| OUF — Everolimus Immunoassay | Class 2 / TX |
| OUG — Medical Device Data System | Class 1 / HO |
| OUH — Skin Resurfacing Rf Applicator | Class 2 / SU |
| OUJ — High Level Disinfection Reprocessing Instrument For Ultrasonic Transducers, Mist | Class 2 / HO |
| OUK — Surgical Mask With Antimicrobial/Antiviral Agent | Class 2 / HO |
| OUL — Thermocycler, Generic | Class 1 / CH |
| OUM — Adaptometer (Biophotometer), Software-Based Data Acquisition And Stimulus Generation | Class 1 / OP |
| OUO — Tomographic Imager Combining Emission Computed Tomography With Nuclear Magnetic Resonance | Class 2 / RA |
| OUP — Powered Surgical Instrument For Improvement In The Appearance Of Cellulite | Class 2 / SU |
| OUR — Sacroiliac Joint Fixation | Class 2 / OR |
| OUS — Methicillin Resistant Staphylococcus Aureus/Methicillin Susceptible Staphylococcus Aureus Blood Culture Test Bt | Class 1 / MI |
| OUT — Intracranial Aneurysm Flow Diverter | Class 3 / NE |
| OUU — Polymeric Neurovascular Embolization | Class f / NE |
| OUW — Infant Positioner, Rx, Use In Highly Monitored Setting | Class 1 / HO |
| OUY — Trichomonas Vaginalis Nucleic Acid Amplification Test System | Class 2 / MI |
| OUZ — Nucleic Amplification Assays For The Detection Of Leishmania Nucleic Acids | Class 1 / MI |
| OVA — Complete Gene Expression Profiling Accessory Reagents | Class 2 / CH |
| OVB — Hydrogel Spacer | Class 2 / RA |
| OVC — Headframe | Class N / NE |
| OVD — Intervertebral Fusion Device With Integrated Fixation, Lumbar | Class 2 / OR |
| OVE — Intervertebral Fusion Device With Integrated Fixation, Cervical | Class 2 / OR |
| OVF — Assay, Direct, Nucleic Acid Amplification, Q Fever | Class 1 / MI |
| OVG — Magnetic Cell Selection System For Cd34+ Cells From Hpc-Apheresis Used In Treatment Of Acute Myeloid Leukemia (Aml) | Class f / HE |
| OVJ — Pulse Generator, External Pacemaker, Dual Chamber | Class 2 / CV |
| OVK — Cytokeratin Fragments 21-1 Eia Kit | Class 2 / IM |
| OVL — Hemodialyzer, High Cut-Off | Class f / GU |
| OVN — Suture Kit | Class 2 / SU |
| OVO — Prosthesis, Hip, Semi-Constrained, Ceramic-On-Metal Articulation | Class 3 / OR |
| OVP — Vibratory Counter-Stimulation | Class 2 / NE |
| OVQ — Chronic Lymphocytic Leukemia Fish Probe Kit | Class 2 / PA |
| OVR — Kit, First Aid, Talking | Class 1 / HO |