| OKF — Body Fluid Disposal Kit | Class 2 / HO |
| OKG — Body Fluid Clean Up Kit | Class 2 / HO |
| OKH — Body Fluids Barrier Kit | Class 2 / HO |
| OKI — Emergency Response Safety Kit | Class 2 / HO |
| OKJ — Light Based Treatment For Cold Sores Herpes Simplex Virus-1 | Class 2 / SU |
| OKL — Intravascular Administration Set, Automated Air Removal System | Class 2 / HO |
| OKM — Antibodies, Outer-Membrane Proteins | Class 2 / IM |
| OKN — Hyperthermia System, Bladder Cancer Treatment, With Chemotherapy | Class 3 / GU |
| OKO — Negative Pressure Wound Therapy Non-Powered Suction Apparatus | Class 2 / SU |
| OKP — Transcranial Magnetic Stimulator For The Treatment Of Migraine Headache | Class 2 / NE |
| OKR — Ventricular Bypass (Assist) Device | Class 3 / CV |
| OKS — Lacrimal Stents And Intubation Sets | Class U / OP |
| OKU — Emergency Obstetrical Kit | Class 1 / OB |
| OKV — Obstetrical Kit | Class 2 / OB |
| OKW — Seminal Fluid Collection Kit | Class 2 / OB |
| OKX — Trocar Kit | Class 2 / OB |
| OKY — Cytology Kit | Class 2 / OB |
| OKZ — Endometrial Sampling Kit | Class 2 / OB |
| OLC — Scaffold, Partial Medial Meniscal Defects Extending Into The Red/White Zone, Resorbable Bovine Collagen | Class 2 / OR |
| OLD — Internal Polymerase Chain Reaction Control, Not Assay Specific | Class 1 / CH |
| OLF — Medevac Use Oxygen Generator | Class 2 / AN |
| OLH — Orchidometer | Class 1 / GU |
| OLI — Fat Reducing Low Level Laser | Class 2 / SU |
| OLK — Pulse Oximeter For Over-The-Counter Use | Class 2 / AN |
| OLL — Septal Stapler/Absorbable Staples | Class 2 / EN |
| OLM — Deep Brain Stimulator For Obsessive Compulsive Disorder (Ocd) | Class f / NE |
| OLO — Orthopedic Stereotaxic Instrument | Class 2 / OR |
| OLP — Over-The-Counter Powered Light Based Laser For Acne | Class 2 / SU |
| OLQ — Cross-Sectional Mammographic Xray System | Class 3 / RA |
| OLR — Oral Wound Dressing | Class U / DE |
| OLS — Oral Wound Dressing W/Drug And/Or Biologic | Class U / DE |
| OLT — Non-Normalizing Quantitative Electroencephalograph Software | Class 2 / NE |
| OLU — Normalizing Quantitative Electroencephalograph Software | Class 2 / NE |
| OLV — Standard Polysomnograph With Electroencephalograph | Class 2 / NE |
| OLW — Index-Generating Electroencephalograph Software | Class 2 / NE |
| OLX — Source Localization Software For Electroencephalograph Or Magnetoencephalograph | Class 2 / NE |
| OLY — Magnetoencephalograph | Class 2 / NE |
| OLZ — Automatic Event Detection Software For Polysomnograph With Electroencephalograph | Class 2 / NE |
| OMA — Amplitude-Integrated Electroencephalograph | Class 2 / NE |
| OMB — Automatic Event Detection Software For Full-Montage Electroencephalograph | Class 2 / NE |
| OMC — Reduced- Montage Standard Electroencephalograph | Class 2 / NE |
| OMD — Cutaneous Tissue Adhesive With Mesh | Class 2 / SU |
| OME — Extracorporeal Shock Wave Treatment | Class 3 / OR |
| OMF — Percutaneous, Implanted, Long-Term Intravascular Catheter Accessory For Catheter Position | Class 2 / HO |
| OMG — Antisera, Fluorescent, Human Metapneumovirus | Class 2 / MI |
| OMH — Pericardial Patch To Facilitate Revision Surgeries | Class 2 / CV |
| OMI — Multiplex Flow Immunoassay, T. Gondii, Rubella And Cmv | Class 2 / MI |
| OMJ — Chest X-Ray Computer Aided Detection | Class 2 / RA |
| OMM — Test 5, 10-Methylenetetrahydrofolate Reductase Mutations, Genomic Dna Pcr | Class 2 / HE |
| OMN — C. Difficile Nucleic Acid Amplification Test Assay | Class 1 / MI |