| NNutramax | Brockton | MA | — | ◇ UNVERIFIED |
| NENutritional Engineering INC | Vista | CA | — | ◇ UNVERIFIED |
| NSNutritional Supplement Manufacturers, Inc. | Chula Vista | CA | — | ◇ UNVERIFIED |
| OCObagi Cosmeceuticals LLC | Long Beach | CA | — | ◇ UNVERIFIED |
| OPOctogen Pharmical Company | Cumming | GA | — | ◇ UNVERIFIED |
| OPOdin Pharmaceuticals LLC | Somerset | NJ | — | ◇ UNVERIFIED |
| OTOdyssey Thera, INC | San Ramon | CA | — | ◇ UNVERIFIED |
| OIOep Innovations INC | San Diego | CA | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. - Black Horse Lane | Monmouth Junction | NJ | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. New Brunswick Facility | New Brunswick | NJ | — | ◇ UNVERIFIED |
| OLOhm Laboratories INC. North Brunswick Facilit | North Brunswick | NJ | — | ◇ UNVERIFIED |
| OPOhr Paharma LLC (ohr Pharmaceutical) | San Diego | CA | — | ◇ UNVERIFIED |
| OCOhsu Creekside Pharmacy | Beaverton | OR | — | ◇ UNVERIFIED |
| OLOlay LLC | Cayey | PR | — | ◇ UNVERIFIED |
| OCOlfera Corporation | South San Francisco | CA | — | ◇ UNVERIFIED |
| OTOliver Tucher | Los Altos | CA | — | ◇ UNVERIFIED |
| OIOmniox INC | San Carlos | CA | — | ◇ UNVERIFIED |
| OPOmni Preventive Care 3m Espe | Bentonville | AR | — | ◇ UNVERIFIED |
| OOncosenx | San Diego | CA | — | ◇ UNVERIFIED |
On Demand Pharmaceuticals, INC. | Rockville | MD | — | ◇ UNVERIFIED |
On Demand Pharmaceuticals, INC. | Tupelo | MS | — | ◇ UNVERIFIED |
| OCOnesource Compounding Pharmacy | Santa Cruz | CA | — | ◇ UNVERIFIED |
| OWOne World, LLC | Argyle | TX | — | ◇ UNVERIFIED |
| OPOpi Products INC. | N Hollywood | CA | — | ◇ UNVERIFIED |
| OIOptikem Intl | Denver | CO | — | ◇ UNVERIFIED |
| OCOption Care Enter Dba Walgreens Infus Services | Paducah | KY | — | ◇ UNVERIFIED |
| OCOption Care Enterprises INC Dba Option Care | Chico | CA | — | ◇ UNVERIFIED |
| OSOptum Specialty Pharmacy #801 | Phoenix | AZ | — | ◇ UNVERIFIED |
| OBOrganic By Nature | Long Beach | CA | — | ◇ UNVERIFIED |
| OCOrganic Consultants (woodruff) | Eugene | OR | — | ◇ UNVERIFIED |
| OLOrganics LLC | Chicago | IL | — | ◇ UNVERIFIED |
| OUOrganon USA INC. | West Orange | NJ | — | ◇ UNVERIFIED |
| OLOrnela, LLC | Fairfield | CA | — | ◇ UNVERIFIED |
| OMOrtho Mcneil Pharmaceutical | Menlo Park | CA | — | ◇ UNVERIFIED |
| OPOrtho-mcneil Pharmaceutical CORP | Raritan | NJ | — | ◇ UNVERIFIED |
| OPOrtho-mcneil Pharmaceutical INC | Alexandria Twp | NJ | — | ◇ UNVERIFIED |
| OPOrtho Pharmaceutical | Manati | PR | — | ◇ UNVERIFIED |
| OBOsanni Bio INC | San Carlos | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #1 | Redding | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #14 | Red Bluff | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #16 | Susanville | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #17 | Redding | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #18 | Weaverville | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #2 | Redding | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #21 | Palo Cedro | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #22 | Mount Shasta | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #25 | Weed | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #3 | Anderson | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare #5 | Red Bluff | CA | — | ◇ UNVERIFIED |
| OHOwens Healthcare - Specialty Pharmacy INC Dba Owens Infusion #9 | Redding | CA | — | ◇ UNVERIFIED |