| Code | Display | Comments |
|---|
 AB | Abbott Laboratories (includes Ross Products Division) | |
| AD | Adams Laboratories | |
| ALP | Alpha Therapeutic Corporation | |
| AR | Armour [Inactive - use CEN] | |
| AVI | Aviron | |
| BA | Baxter Healthcare Corporation | |
| BAY | Bayer Corporation (includes Miles, Inc. and Cutter Laboratories) | |
| BP | Berna Products [Inactive - use BPC] | |
| BPC | Berna Products Corporation (includes Swiss Serum and Vaccine Institute Berne) | |
| CEN | Centeon L.L.C. (includes Armour Pharmaceutical Company) | |
| CHI | Chiron Corporation | |
| CON | Connaught [Inactive - use PMC] | |
| EVN | Evans Medical Limited (an affiliate of Medeva Pharmaceuticals, Inc.) | |
| GRE | Greer Laboratories, Inc. | |
| IAG | Immuno International AG | |
| IM | Merieux [Inactive - use PMC] | |
| IUS | Immuno-U.S., Inc. | |
| JPN | The Research Foundation for Microbial Diseases of Osaka University (BIKEN) | |
| KGC | Korea Green Cross Corporation | |
| LED | Lederle [Inactive - use WAL] | |
| MA | Massachusetts Public Health Biologic Laboratories | |
| MED | MedImmune, Inc. | |
| MIL | Miles [Inactive - use BAY] | |
| MIP | Bioport Corporation (formerly Michigan Biologic Products Institute) | |
| MSD | Merck and Co., Inc. | |
| NAB | NABI (formerly North American Biologicals, Inc.) | |
| NAV | North American Vaccine, Inc. | |
| NOV | Novartis Pharmaceutical Corporation (includes Ciba-Geigy Limited and Sandoz Limited) | |
| NYB | New York Blood Center | |
| ORT | Ortho Diagnostic Systems, Inc. | |
| OTC | Organon Teknika Corporation | |
| PD | Parkedale Pharmaceuticals (formerly Parke-Davis) | |
| PMC | Aventis Pasteur Inc. (formerly Pasteur Merieux Connaught; includes Connaught Laboratories and Pasteur Merieux) | |
| PRX | Praxis Biologics [Inactive - use WAL] | |
| SCL | Sclavo, Inc. | |
| SI | Swiss Serum and Vaccine Inst. [Inactive - use BPC] | |
| SKB | SmithKline Beecham | |
| USA | United States Army Medical Research and Materiel Command | |
| WA | Wyeth-Ayerst [Inactive - use WAL] | |
| WAL | Wyeth-Ayerst (includes Wyeth-Lederle Vaccines and Pediatrics, Wyeth Laboratories, Lederle Laboratories, and Praxis Biologics) | |