| NHT — Assay, Nucleic Acid Amplification, Bacillus Anthracis | Class 2 / MI |
| NHV — System, Water Purification, General Medical Use | Class 2 / GU |
| NHW — Electrode, Pacing And Cardioversion, Temporary, Epicardial | Class 2 / CV |
| NHX — Antibodies, Anti-Cyclic Citrullinated Peptide (Ccp) | Class 2 / IM |
| NHY — Assay, Direct, Nucleic Acid Amplification, Respiratory Syncytial Virus | Class 1 / MI |
| NHZ — Assay, Direct, Nucleic Acid Amplification, Parainfluenza Virus | Class 1 / MI |
| NIA — Assay, Direct, Nucleic Acid Amplification, Influenza Virus | Class 1 / MI |
| NIC — Lens, Contact, For Reading Discomfort | Class 2 / OP |
| NID — Assay, Proliferation, In Vitro, T Lymphocyte | Class 2 / IM |
| NIE — Catheter, Hemodialysis, Triple Lumen, Non-Implanted | Class 2 / GU |
| NIF — Catheter, Hemodialysis, Triple Lumen, Implanted | Class 2 / GU |
| NIG — System, Test, Carbohydrate Antigen (Ca19-9), For Monitoring And Management Of Pancreatic Cancer | Class 2 / IM |
| NIH — Disinfectant, Subsystem, Water Purification | Class 2 / HO |
| NII — Disinfectant, Dialysate Delivery System | Class 2 / HO |
| NIJ — System, Test, Genotypic Detection, Resistant Markers, Enterococcus Species | Class 2 / MI |
| NIK — Defibrillator, Automatic Implantable Cardioverter, With Cardiac Resynchronization (Crt-D) | Class 3 / CV |
| NIM — Stent, Carotid | Class 3 / CV |
| NIN — Stent, Renal | Class 3 / CV |
| NIO — Stent, Iliac | Class 3 / CV |
| NIP — Stent, Superficial Femoral Artery | Class 3 / CV |
| NIQ — Coronary Drug-Eluting Stent | Class 3 / CV |
| NIU — Stent, Superficial Femoral Artery, Drug-Eluting | Class 3 / CV |
| NIV — Coronary Covered Stent | Class f / CV |
| NIX — Hearing Aid, Air Conduction, Transcutaneous System | Class 2 / EN |
| NIY — Autoantibodies, Anti-Soluble Liver Antigen (Sla), Autoimmune Hepatitis | Class 2 / IM |
| NIZ — Lens, Iris Reconstruction | Class 3 / OP |
| NJA — Accessory, System, External Fixator, Containing Antimicrobial Agent | Class 2 / OR |
| NJB — Orthosis, Truncal, For Dysmenorrhea | Class 1 / PM |
| NJC — Clip, Vas Deferens | Class 2 / SU |
| NJD — Prosthesis, Knee, Femorotibial, Unicompartmental/Unicondylar, Uncemented, Porous-Coated, Metal/Polymer | Class 2 / OR |
| NJE — Intracranial Neurovascular Stent | Class f / NE |
| NJF — Antibodies, Anti-Actin, Anti-Smooth Muscle | Class 2 / IM |
| NJG — Flasher, Afterimage, Ophthalmic | Class 2 / OP |
| NJH — Lens, Spectacle (Prescription), For Reading Discomfort | Class 1 / OP |
| NJJ — Tonometer, Analyzer, Ocular Blood Flow | Class 2 / OP |
| NJK — Valve, Pulmonary | Class 3 / AN |
| NJL — Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Metal/Polymer, Mobile Bearing | Class 3 / OR |
| NJM — Bracket, Ceramic, Orthodontic | Class 2 / DE |
| NJO — System, Mycolic Acid Analysis, Mycobacterium Tuberculosis | Class 1 / MI |
| NJR — Nucleic Acid Amplification Assay System, Group B Streptococcus, Direct Specimen Test | Class 1 / MI |
| NJT — Immunohistochemistry Reagents And Kits | Class 1 / PA |
| NJU — Suture, Nonabsorbable, Nitinol | Class 2 / SU |
| NJV — Test, Albumin Cobalt Binding | Class 2 / CH |
| NJW — Control Material, Her-2/Neu, Immunohistochemistry | Class 2 / PA |
| NJZ — Extractor, Vein | Class 1 / SU |
| NKA — System, Documentation, Breast Lesion | Class 2 / OB |
| NKB — Thoracolumbosacral Pedicle Screw System | Class 2 / OR |
| NKC — Tubing/Tubing With Filter, Insufflation, Laparoscopic | Class 1 / OB |
| NKE — Pulse Generator, Pacemaker, Implantable, With Cardiac Resynchronization (Crt-P) | Class 3 / CV |
| NKF — Immunohistochemistry Antibody Assay, C-Kit | Class 3 / PA |