A partial fill of a C-II prescription is permitted if: The pharmacist is unable to fill the full quantity of the prescription, pursuant to 21 CFR §1306.13(a); The prescription is issued for a patient in a long-term care facility or for a patient with a medical diagnosis documenting a terminal illness pursuant to 21 CFR 1306.13(b) or (c); Requested by the patient or the practitioner that wrote the prescription, pursuant to 21 CFR §1306.13(b); or The total quantity dispensed in all partial fillings does not exceed the total quantity prescribed.