Below is a list of wholesalers and physician distributors that have met the requirements to be listed as a Merck Authorized Distributor (MAD).
| A.F. HAUSER, INC. | MEDPOINT, INC. |
| ABO PHARMACEUTICALS | MERIT PHARMA |
| AMERICAN MEDICINE | METRO MEDICAL SUPPLY |
| AMERISOURCEBERGEN CORPORATION | MIAMI LUKEN |
| ANDA | MIDWEST MEDICAL SUPPLY |
| APOTHECA, INC. | MODERN MEDICAL PRODUCTS |
| A-S MEDICATION SOLUTIONS | MORRIS & DICKSON CO. |
| ASD SPECIALTY HEALTHCARE INC. | NC MUTUAL |
| BDI PHARMA, INC. | OMNI MEDICAL SUPPLY |
| BELL MEDICAL SERVICES | ONCOLOGY SUPPLY |
| BELLCO DRUG CORPORATION | ONCOLOGY THERAPEUTICS |
| BESSE DRUG | PARAGON ENTERPRISES INC. |
| BIOPHARM DIST. INC. | PARK SURGICAL COMPANY |
| BURLINGTON DRUG | PHARMACY BUYING ASSOCIATION, INC. |
| C.T. INTERNATIONAL | PRACTRX (a division of Anda, Inc.) |
| CAPITAL WHOLESALE DRUG CO. | PRESCRIPTION SUPPLY INC. |
| CARDINAL HEALTH | PRIORITY PHARMACEUTICALS |
| CENTER MEDICAL SUPPLY | PSS WORLD MEDICAL INC. |
| CLINT PHARMACEUTICALS INC. | QK HEALTHCARE INC. |
| CORNELL SURGICAL CO | R & S NORTHEAST LLC |
| D&H WHOLESALE MEDICAL INC. | R. WEINSTEIN INC. |
| DAKOTA DRUG INC. | RALLY INC. |
| DIK DRUG COMPANY | REBEL DISTRIBUTORS CORP |
| DIVERSIFIED BIOLOGICALS, LLC | REGIMED MEDICAL |
| DMS PHARMACEUTICAL GROUP INC. | RELIANCE WHOLESALE, INC. |
| EVEREADY WHOLS DRUGS | ROCHESTER DRUG COMPANY |
| FFF ENTERPRISES | ROCKWELL MEDICAL SUPPLY INC. |
| FIRST LAN CORPORATION | SAN JOSE SURGICAL |
| FLORIDA INFUSION SERVICES, INC. | SEACOAST MEDICAL |
| FRANK W. KERR CO. | SEAWAY SURGICAL |
| H.D. SMITH | SENECA MEDICAL INC. |
| HANNA'S PHARMACEUTICAL SUPPLY CO., INC. | SMITH DRUG COMPANY |
| HENRY SCHEIN | STAT PHARMA |
| KINRAY INC. | STERLING MEDICAL |
| KRASITY'S MEDICAL AND SURGICAL SUPPLY | SUPERIOR MEDICAL SUPPLY |
| LAKE ERIE MED. & SURG. SUPPLY | THE HARVARD DRUG GROUP |
| LIFELINE PHARMACEUTICALS | TRUXTON, INC. |
| MARTIN SURGICAL SUPPLY CO. | UNIVERSAL MEDSURG SUPPLIES INC. |
| MCKESSON DRUG | US ONCOLOGY SPECIALTY LP |
| MCKESSON MEDICAL SURGICAL INC. | VALLEY WHOLESALE |
| MED HEALTH PHARMACEUTICAL PRODUCTS | VALUE DRUG |
| MEDICAL ARTS PHARMACY | VAX SERVE |
| MEDICAL SUPPLY CORPORATION | VAXMAX, INC. |
| MEDICO-MART INC. | VERTICAL SOURCE PHARMA |
| MEDPLUS OF NJ | VITA-RX CORPORATION |