A C89510 NCPDP QuantityUnitOfMeasure Terminology C120216 Pen Needle Pen Needle A single use, hollow needle embedded in a plastic hub, which is then attached to a preloaded syringe (pen) to facilitate the delivery of medication. A C89510 NCPDP QuantityUnitOfMeasure Terminology C120263 Lancet Lancet A small, sharp, needle-like instrument that is used to puncture the skin.