A medical supply cabinet was a storage area for medical tools and medicines.

In 2268, before anyone knew that Deela was on board the USS Enterprise, Nurse Chapel reported that the sickbay cabinets had been opened and disorganized, though nothing was missing. (TOS: "Wink of an Eye")

In 2269, James T. Kirk found Orientine acid in the cabinet and used it to threaten a Vendorian disguised as Carter Winston. (TAS: "The Survivor")