Final answer:
Over-the-counter medications are not included in revenue code series 063X, which covers items like compounded prescriptions, injectable drugs, and diabetic supplies.
Step-by-step explanation:
The subcategory description that is not included in revenue code series 063X (Pharmacy - Extension of 025X) is d) Over-the-counter medications. This series typically includes charges for items such as compounded prescriptions, injectable drugs, and diabetic supplies provided to a patient while under the care of a hospital or healthcare facility. Over-the-counter medications are generally not included in these pharmacy revenue codes as they are not considered prescription drugs or medical supplies typically requiring detailed tracking and billing under hospital care.