The main purpose of Modifier 25 is Significant, separately identifiable E/M service by the same physician on the same day of the procedure. For example, a patient comes in with a sore throat and during the exam, the provider decides to give an intramuscular steroid shot
Some researchers adjust escalation timing based on body weight and individual response, but the target doses themselves remain the same across the research population
Room temperature solution is more comfortable than cold solution, so let the syringe warm in your hand for 30 seconds after drawing the dose (but do not leave the vial out of the fridge)
Intrinsic factor, a protein that shuttles B12 through the absorption process, becomes saturated after a meal containing an above-average amount of B12 and about 4 to 6 hours are required before it can efficiently absorb another dose (IOM, 1998)
The Short and Long Answer Yes, it expires